diff --git a/luci-app-amlogic/Makefile b/luci-app-amlogic/Makefile
index 4df59bdf4..0b92b1184 100644
--- a/luci-app-amlogic/Makefile
+++ b/luci-app-amlogic/Makefile
@@ -22,11 +22,11 @@ PKG_NAME:=luci-app-amlogic
 #   DD = day    (01 = 1st)
 #   NN = daily release sequence (01 = first release of the day, 02 = second, ...)
 # Example below: 26.10.0101 = October 1, 2026, 1st release of the day
-PKG_VERSION:=26.10.1602
+PKG_VERSION:=26.10.1603
 # PKG_RELEASE marks the LuCI variant; onekey-install.sh relies on it (do NOT bump)
 #   1 = Lua version (lua branch)  → tag: 26.10.0101
 #   2 = JS version  (main branch) → tag: 26.10.0101-js
-PKG_RELEASE:=22
+PKG_RELEASE:=23
 
 PKG_LICENSE:=GPL-2.0 License
 PKG_MAINTAINER:=ophub <https://github.com/ophub/luci-app-amlogic>
diff --git a/luci-app-amlogic/htdocs/luci-static/resources/view/amlogic/config.js b/luci-app-amlogic/htdocs/luci-static/resources/view/amlogic/config.js
index 826855b6e..096045602 100644
--- a/luci-app-amlogic/htdocs/luci-static/resources/view/amlogic/config.js
+++ b/luci-app-amlogic/htdocs/luci-static/resources/view/amlogic/config.js
@@ -44,6 +44,17 @@ return view.extend({
 			'<br />' + _('Tip: The same files as the current OpenWrt system\'s BOARD (such as rock5b) and kernel (such as 5.10) will be downloaded.'));
 		const o = m.section(form.NamedSection, 'config', 'amlogic');
 
+		// Load the derived default ourselves whenever the stored value is blank.
+		const orDefault = function (option, defval) {
+			option.default = defval;
+			option.load = function (section_id) {
+				const v = uci.get(this.uciconfig ?? 'amlogic',
+				                  this.ucisection ?? section_id,
+				                  this.ucioption ?? this.option);
+				return (v == null || v === '') ? defval : v;
+			};
+		};
+
 		// 1. Display device platform
 		const dev = o.option(form.DummyValue, 'mydevice', _('Current Device:'),
 			_('Display the PLATFORM classification of the device.'));
@@ -93,32 +104,38 @@ return view.extend({
 			knownTags.kernel_flippy = 'kernel_flippy [Mainline Stable Kernel by Flippy]';
 			knownTags.kernel_beta   = 'kernel_beta [Beta Kernel]';
 		}
-		// Determine default tag from saved config or kernel_release uname string.
-		let kernelTagDefault = uci.get('amlogic', 'config', 'amlogic_kernel_tags') || '';
-		if (!kernelTagDefault) {
-			const u = state.kernel_release || '';
-			if (u.indexOf('-rk3588') >= 0) kernelTagDefault = 'kernel_rk3588';
-			else if (u.indexOf('-rk35xx') >= 0) kernelTagDefault = 'kernel_rk35xx';
-			else if (u.indexOf('-beta') >= 0) kernelTagDefault = 'kernel_beta';
-			else kernelTagDefault = 'kernel_stable';
-		}
+		// Derive the default tag from the kernel_release uname string. A value already
+		// saved in UCI wins; orDefault() below only kicks in when that value is blank.
+		const uname = state.kernel_release || '';
+		let kernelTagDefault = 'kernel_stable';
+		if (uname.indexOf('-rk3588') >= 0) kernelTagDefault = 'kernel_rk3588';
+		else if (uname.indexOf('-rk35xx') >= 0) kernelTagDefault = 'kernel_rk35xx';
+		else if (uname.indexOf('-beta') >= 0) kernelTagDefault = 'kernel_beta';
 		const ktags = o.option(form.Value, 'amlogic_kernel_tags',
 			_('Kernel download tags:'),
 			_('Set the kernel files download tags on github.com in [Online Download Update].'));
 		Object.keys(knownTags).forEach(function (k) { ktags.value(k, _(knownTags[k])); });
+		// kernel_beta is only offered for ophub/kernel, but a beta kernel may still be
+		// running, so keep the derived value selectable even when it is not listed.
 		if (!knownTags[kernelTagDefault]) ktags.value(kernelTagDefault, kernelTagDefault);
-		ktags.default = kernelTagDefault;
+		orDefault(ktags, kernelTagDefault);
 		ktags.rmempty = false;
 
 		// 7. Kernel branch
-		const kbranch = o.option(form.ListValue, 'amlogic_kernel_branch',
+		const kbranches = ['5.10', '5.15', '6.1', '6.6', '6.12', '6.18'];
+		const kbranch = o.option(form.Value, 'amlogic_kernel_branch',
 			_('Set version branch:'),
 			_('Set the version branch of the OpenWrt files and kernel selected in [Online Download Update].'));
-		['5.10', '5.15', '6.1', '6.6', '6.12', '6.18'].forEach(function (b) {
-			kbranch.value(b, _(b));
+
+		// Extract the major.minor version from the kernel uname string to determine the default branch.
+		const km = uname.match(/^(\d+\.\d+)/);
+		const kbranchDefault = km ? km[1] : kbranches[0];
+		// If the derived default branch is not in the list, add it so it can be selected.
+		if (kbranches.indexOf(kbranchDefault) < 0) kbranches.push(kbranchDefault);
+		kbranches.forEach(function (b) {
+			kbranch.value(b, b);
 		});
-		const m2 = (state.kernel_release || '').match(/^(\d+\.\d+)/);
-		kbranch.default = m2 ? m2[1] : '5.10';
+		orDefault(kbranch, kbranchDefault);
 		kbranch.rmempty = false;
 
 		// 8. Plugin branch
@@ -140,14 +157,14 @@ return view.extend({
 		fcfg.default = '1';
 		fcfg.rmempty = false;
 
-		// 9. Write bootloader
+		// 10. Write bootloader
 		const wb = o.option(form.Flag, 'amlogic_write_bootloader',
 			_('Auto write bootloader:'),
 			_('[Recommended choice] Set whether to auto write bootloader during install and update OpenWrt.'));
 		wb.default = '0';
 		wb.rmempty = false;
 
-		// 10. Shared partition fs type
+		// 11. Shared partition fs type
 		const fst = o.option(form.ListValue, 'amlogic_shared_fstype',
 			_('Set the file system type:'),
 			_('[Default ext4] Set the file system type of the shared partition (/mnt/mmcblk*p4) when install OpenWrt.'));
diff --git a/luci-app-passwall/Makefile b/luci-app-passwall/Makefile
index 57b4c30d2..d4f7d4c3f 100644
--- a/luci-app-passwall/Makefile
+++ b/luci-app-passwall/Makefile
@@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=luci-app-passwall
 PKG_VERSION:=26.10.16
-PKG_RELEASE:=336
+PKG_RELEASE:=337
 PKG_PO_VERSION:=$(PKG_VERSION)
 
 PKG_CONFIG_DEPENDS:= \
diff --git a/luci-app-passwall/root/usr/share/passwall/app.sh b/luci-app-passwall/root/usr/share/passwall/app.sh
index 82bbd1cfd..8f646d0cf 100755
--- a/luci-app-passwall/root/usr/share/passwall/app.sh
+++ b/luci-app-passwall/root/usr/share/passwall/app.sh
@@ -1823,9 +1823,6 @@ stop() {
 		[ -n "${bak_bridge_nf_ip6t}" ] && sysctl -w net.bridge.bridge-nf-call-ip6tables=${bak_bridge_nf_ip6t} >/dev/null 2>&1
 	}
 	rm -rf $TMP_PATH
-	rm -f ${LOCK_PATH}/${CONFIG}_socks_auto_switch*
-	rm -f ${LOCK_PATH}/${CONFIG}_lease2hosts*
-	rm -f ${LOCK_PATH}/${CONFIG}_monitor*
 	echolog "清空并关闭相关程序和缓存完成。"
 	exit 0
 }
diff --git a/luci-app-passwall/root/usr/share/passwall/lease2hosts.sh b/luci-app-passwall/root/usr/share/passwall/lease2hosts.sh
index 3d7d39bdf..0296b8519 100755
--- a/luci-app-passwall/root/usr/share/passwall/lease2hosts.sh
+++ b/luci-app-passwall/root/usr/share/passwall/lease2hosts.sh
@@ -93,6 +93,6 @@ while true; do
 		rm -f "$TMP_FILE"
 	fi
 
-	sleep 60
+	sleep 60 9>&-
 
 done 2>/dev/null
diff --git a/luci-app-passwall2/Makefile b/luci-app-passwall2/Makefile
index 507ba57f4..683326be4 100644
--- a/luci-app-passwall2/Makefile
+++ b/luci-app-passwall2/Makefile
@@ -7,7 +7,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=luci-app-passwall2
 PKG_VERSION:=26.10.1
-PKG_RELEASE:=145
+PKG_RELEASE:=146
 PKG_PO_VERSION:=$(PKG_VERSION)
 
 PKG_CONFIG_DEPENDS:= \
diff --git a/luci-app-passwall2/po/fa/passwall2.po b/luci-app-passwall2/po/fa/passwall2.po
index 5c5b5284b..3aac913aa 100644
--- a/luci-app-passwall2/po/fa/passwall2.po
+++ b/luci-app-passwall2/po/fa/passwall2.po
@@ -2219,8 +2219,14 @@ msgstr "تشخیص تغییر وضعیت سوکت‌ها: تغییر وضعیت
 msgid "Socks switch detection: Port [%s] [%s:[%s]] abnormal."
 msgstr "تشخیص وضعیت سوئیچ: پورت [%s] [%s:[%s]] غیرعادی است."
 
-msgid "Socks switch detection: Port [%s] all nodes are unavailable!"
-msgstr "تشخیص تغییر وضعیت سوئیچ: در پورت [%s]، تمام گره‌ها در دسترس نیستند!"
+msgid "Socks switch detection: Port [%s] all nodes are unavailable or switching failed!"
+msgstr "بررسی تغییر گره SOCKS: پورت [%s]، همه گره‌ها در دسترس نیستند یا تغییر گره ناموفق بود!"
+
+msgid "Socks switch detection: Port [%s] node switch failed, continue trying other nodes!"
+msgstr "بررسی تغییر گره SOCKS: پورت [%s]، تغییر گره ناموفق بود؛ تلاش با گره‌های دیگر ادامه دارد!"
+
+msgid "Socks switch detection: Port [%s] failed to restore the primary node!"
+msgstr "بررسی تغییر گره SOCKS: پورت [%s]، بازیابی گره اصلی ناموفق بود!"
 
 msgid "Socks switch detection: Port [%s] Unknown error."
 msgstr "تشخیص وضعیت سوئیچ جوراب: پورت [%s] خطای ناشناخته."
diff --git a/luci-app-passwall2/po/ru/passwall2.po b/luci-app-passwall2/po/ru/passwall2.po
index 4e97fe1e4..85588a2b6 100644
--- a/luci-app-passwall2/po/ru/passwall2.po
+++ b/luci-app-passwall2/po/ru/passwall2.po
@@ -2220,8 +2220,14 @@ msgstr "Обнаружение переключения соединений: п
 msgid "Socks switch detection: Port [%s] [%s:[%s]] abnormal."
 msgstr "Обнаружено переключение Socks: порт [%s] [%s:[%s]] работает некорректно."
 
-msgid "Socks switch detection: Port [%s] all nodes are unavailable!"
-msgstr "Обнаружено переключение коммутатора: порт [%s], все узлы недоступны!"
+msgid "Socks switch detection: Port [%s] all nodes are unavailable or switching failed!"
+msgstr "Проверка переключения SOCKS: порт [%s], все узлы недоступны или переключение не удалось!"
+
+msgid "Socks switch detection: Port [%s] node switch failed, continue trying other nodes!"
+msgstr "Проверка переключения SOCKS: порт [%s], переключить узел не удалось, пробуем другие узлы!"
+
+msgid "Socks switch detection: Port [%s] failed to restore the primary node!"
+msgstr "Проверка переключения SOCKS: порт [%s], не удалось восстановить основной узел!"
 
 msgid "Socks switch detection: Port [%s] Unknown error."
 msgstr "Обнаружение переключения разъема: порт [%s], неизвестная ошибка."
diff --git a/luci-app-passwall2/po/zh-cn/passwall2.po b/luci-app-passwall2/po/zh-cn/passwall2.po
index 1c4de240b..4cda9e08f 100644
--- a/luci-app-passwall2/po/zh-cn/passwall2.po
+++ b/luci-app-passwall2/po/zh-cn/passwall2.po
@@ -2205,8 +2205,14 @@ msgstr "Socks切换检测：端口 [%s] 节点切换完毕！"
 msgid "Socks switch detection: Port [%s] [%s:[%s]] abnormal."
 msgstr "Socks切换检测：端口 [%s] 异常。"
 
-msgid "Socks switch detection: Port [%s] all nodes are unavailable!"
-msgstr "Socks切换检测：端口 [%s] 所有节点均不可用！"
+msgid "Socks switch detection: Port [%s] all nodes are unavailable or switching failed!"
+msgstr "Socks切换检测：端口 [%s] 所有节点均不可用或切换失败！"
+
+msgid "Socks switch detection: Port [%s] node switch failed, continue trying other nodes!"
+msgstr "Socks切换检测：端口 [%s] 节点切换失败，继续尝试其他节点！"
+
+msgid "Socks switch detection: Port [%s] failed to restore the primary node!"
+msgstr "Socks切换检测：端口 [%s] 恢复主节点失败！"
 
 msgid "Socks switch detection: Port [%s] Unknown error."
 msgstr "Socks切换检测：端口 [%s] 未知错误。"
diff --git a/luci-app-passwall2/po/zh-tw/passwall2.po b/luci-app-passwall2/po/zh-tw/passwall2.po
index bceea27c1..9cdc756b7 100644
--- a/luci-app-passwall2/po/zh-tw/passwall2.po
+++ b/luci-app-passwall2/po/zh-tw/passwall2.po
@@ -2211,8 +2211,14 @@ msgstr "Socks切換偵測：連接埠 [%s] 節點切換完畢！"
 msgid "Socks switch detection: Port [%s] [%s:[%s]] abnormal."
 msgstr "Socks切換偵測：連接埠 [%s] 異常。"
 
-msgid "Socks switch detection: Port [%s] all nodes are unavailable!"
-msgstr "Socks切換偵測：連接埠 [%s] 所有節點均不可用！"
+msgid "Socks switch detection: Port [%s] all nodes are unavailable or switching failed!"
+msgstr "Socks切換偵測：連接埠 [%s] 所有節點均不可用或切換失敗！"
+
+msgid "Socks switch detection: Port [%s] node switch failed, continue trying other nodes!"
+msgstr "Socks切換偵測：連接埠 [%s] 節點切換失敗，繼續嘗試其他節點！"
+
+msgid "Socks switch detection: Port [%s] failed to restore the primary node!"
+msgstr "Socks切換偵測：連接埠 [%s] 恢復主節點失敗！"
 
 msgid "Socks switch detection: Port [%s] Unknown error."
 msgstr "Socks切換偵測：連接埠 [%s] 未知錯誤。"
diff --git a/luci-app-passwall2/root/usr/share/passwall2/app.sh b/luci-app-passwall2/root/usr/share/passwall2/app.sh
index a998d6e38..29956404f 100755
--- a/luci-app-passwall2/root/usr/share/passwall2/app.sh
+++ b/luci-app-passwall2/root/usr/share/passwall2/app.sh
@@ -380,7 +380,7 @@ run_socks() {
 	if [ -n "$server_host" ] && [ -n "$server_port" ]; then
 		check_host $server_host
 		[ $? != 0 ] && {
-			log 1 "$(i18n "Socks node: [%s]%s is an invalid server address and cannot be started!" "${$remarks}" "${server_host}")"
+			log 1 "$(i18n "Socks node: [%s]%s is an invalid server address and cannot be started!" "${remarks}" "${server_host}")"
 			return 1
 		}
 		tmp="${server_host}:${server_port}"
@@ -553,9 +553,12 @@ socks_node_switch() {
 		local http_config_file="${flag}_http.json"
 		LOG_FILE="/dev/null"
 		run_socks flag=$flag node=$new_node bind=$bind socks_port=$port config_file=$config_file http_port=$http_port http_config_file=$http_config_file log_file=$log_file
+		sleep 2s
+		[ "$(check_port_exists "$port" tcp)" = "0" ] && return 1
 		set_cache_var "${flag}" "$new_node"
 		local USE_TABLES=$(get_cache_var "USE_TABLES")
 		[ -n "$USE_TABLES" ] && source $APP_PATH/${USE_TABLES}.sh filter_direct_node_list
+		return 0
 	}
 }
 
@@ -579,11 +582,15 @@ start_socks() {
 				[ "$log" == "0" ] && log_file=""
 				local http_port=$(config_n_get $id http_port 0)
 				local http_config_file="${id}_http.json"
-				run_socks flag=$id node=$node bind=$bind socks_port=$port config_file=$config_file http_port=$http_port http_config_file=$http_config_file log_file=$log_file
+				local enable_autoswitch=$(config_n_get $id enable_autoswitch 0)
+				if [ "$enable_autoswitch" = "1" ]; then
+					NO_REC_PROCESS=1 $APP_PATH/app.sh run_socks flag=$id node=$node bind=$bind socks_port=$port config_file=$config_file http_port=$http_port http_config_file=$http_config_file log_file=$log_file
+				else
+					run_socks flag=$id node=$node bind=$bind socks_port=$port config_file=$config_file http_port=$http_port http_config_file=$http_config_file log_file=$log_file
+				fi
 				set_cache_var "${id}" "$node"
 
 				# Auto switch logic
-				local enable_autoswitch=$(config_n_get $id enable_autoswitch 0)
 				[ "$enable_autoswitch" = "1" ] && { $APP_PATH/socks_auto_switch.sh ${id} > /dev/null 2>&1 & }
 			done
 		}
@@ -999,8 +1006,6 @@ stop() {
 		[ -n "${bak_bridge_nf_ip6t}" ] && sysctl -w net.bridge.bridge-nf-call-ip6tables=${bak_bridge_nf_ip6t} >/dev/null 2>&1
 	}
 	rm -rf $TMP_PATH
-	rm -f ${LOCK_PATH}/${CONFIG}_socks_auto_switch*
-	rm -f ${LOCK_PATH}/${CONFIG}_lease2hosts*
 	rm -f ${LOCK_PATH}/${CONFIG}_monitor*
 	log_i18n 0 "Clearing and closing related programs and cache complete."
 	exit 0
diff --git a/luci-app-passwall2/root/usr/share/passwall2/lease2hosts.sh b/luci-app-passwall2/root/usr/share/passwall2/lease2hosts.sh
index 9dc88249e..41da3ba6c 100755
--- a/luci-app-passwall2/root/usr/share/passwall2/lease2hosts.sh
+++ b/luci-app-passwall2/root/usr/share/passwall2/lease2hosts.sh
@@ -93,6 +93,6 @@ while true; do
 		rm -f "$TMP_FILE"
 	fi
 
-	sleep 60
+	sleep 60 9>&-
 
 done 2>/dev/null
diff --git a/luci-app-passwall2/root/usr/share/passwall2/socks_auto_switch.sh b/luci-app-passwall2/root/usr/share/passwall2/socks_auto_switch.sh
index 634c276a0..409ab9562 100755
--- a/luci-app-passwall2/root/usr/share/passwall2/socks_auto_switch.sh
+++ b/luci-app-passwall2/root/usr/share/passwall2/socks_auto_switch.sh
@@ -3,11 +3,9 @@
 . /usr/share/passwall2/utils.sh
 APP_FILE=${APP_PATH}/app.sh
 
-flag=0
-
 check_process() {
 	while busybox pgrep -af "${CONFIG}/" | grep -E 'app\.sh.*(start|stop)|nftables\.sh|iptables\.sh|subscribe\.lua' >/dev/null; do
-		sleep 6s
+		sleep 6s 8>&- 9>&-
 	done
 }
 
@@ -25,19 +23,21 @@ test_url() {
 	fi
 	[ "$curl_retry_all_errors" = "1" ] && extra_params="--retry-all-errors ${extra_params}"
 
-	local max_time=$((timeout * (try + 1) + try + 3))
+	local max_time=$((timeout + 3))
+	local retry_max_time=$((max_time * (try + 1) + try))
 	curl_test() {
-		/usr/bin/curl -skIL -o /dev/null ${extra_params} --max-time ${max_time} --connect-timeout ${timeout} --retry ${try} --retry-delay 1 -w "%{http_code}" "$url"
+		/usr/bin/curl -skIL -o /dev/null ${extra_params} --max-time ${max_time} --connect-timeout ${timeout} --retry ${try} --retry-delay 1 --retry-max-time ${retry_max_time} -w "%{http_code}" "$url" 8>&- 9>&-
 	}
 
-	local status=$(curl_test)
+	local status
+	status=$(curl_test) || status=000
 	[ "$status" = "204" ] && status=200
 	if [ "$status" = "200" ] && [ "$repeat" = "1" ]; then
-		sleep 3s
-		status=$(curl_test)
+		sleep 3s 8>&- 9>&-
+		status=$(curl_test) || status=000
 		[ "$status" = "204" ] && status=200
 	fi
-	echo $status
+	printf '%s' "$status"
 }
 
 test_proxy() {
@@ -51,7 +51,7 @@ test_proxy() {
 			result=1
 		else
 			result=2
-			ping -c 3 -W 1 223.5.5.5 > /dev/null 2>&1
+			ping -c 3 -W 1 223.5.5.5 > /dev/null 2>&1 8>&- 9>&-
 			[ $? -eq 0 ] && {
 				result=1
 			}
@@ -62,24 +62,31 @@ test_proxy() {
 
 test_node() {
 	local node_id=$1
-	local _type=$(echo $(config_n_get ${node_id} type) | tr 'A-Z' 'a-z')
-	[ -n "${_type}" ] && {
-		check_process
-		local _tmp_port=$(get_new_port 48800 tcp,udp)
-		NO_REC_PROCESS=1 $APP_FILE run_socks flag="test_node_${node_id}" node=${node_id} bind=127.0.0.1 socks_port=${_tmp_port} config_file=test_node_${node_id}.json
-		sleep 2s
-		local curlx="socks5h://127.0.0.1:${_tmp_port}"
-		local _proxy_status=$(test_url "${probe_url}" ${retry_num} ${connect_timeout} "-x $curlx" 1)
-		# Kill the SS plugin process
-		local pid_file="${TMP_PATH}/test_node_${node_id}_plugin.pid"
-		[ -s "$pid_file" ] && kill -9 "$(head -n 1 "$pid_file")" >/dev/null 2>&1
-		busybox pgrep -af "test_node_${node_id}" | awk '! /socks_auto_switch\.sh/{print $1}' | xargs kill -9 >/dev/null 2>&1
-		rm -rf ${TMP_PATH}/test_node_${node_id}*.*
-		if [ "${_proxy_status}" -eq 200 ]; then
-			return 0
-		fi
-	}
-	return 1
+	local test_flag="test_node_${id}_${node_id}"
+	local _type _tmp_port curlx _proxy_status pid_file
+	(
+		exec 9>&-
+		exec 8>"${LOCK_PATH}/${CONFIG}_socks_auto_switch_test.lock"
+		flock -x 8 || exit 1
+		_type=$(echo $(config_n_get ${node_id} type) | tr 'A-Z' 'a-z')
+		[ -n "${_type}" ] && {
+			check_process
+			_tmp_port=$(get_new_port 48800 tcp,udp) || exit 1
+			NO_REC_PROCESS=1 "$APP_FILE" run_socks flag="$test_flag" node="$node_id" bind=127.0.0.1 socks_port="$_tmp_port" config_file="${test_flag}.json" 8>&- 9>&-
+			sleep 2s 8>&- 9>&-
+			curlx="socks5h://127.0.0.1:${_tmp_port}"
+			_proxy_status=$(test_url "${probe_url}" ${retry_num} ${connect_timeout} "-x $curlx" 1)
+			# Kill the SS plugin process.
+			pid_file="${TMP_PATH}/${test_flag}_plugin.pid"
+			[ -s "$pid_file" ] && kill -9 "$(head -n 1 "$pid_file")" >/dev/null 2>&1
+			busybox pgrep -af "${TMP_PATH}/${test_flag}[._]" | awk '! /socks_auto_switch\.sh/{print $1}' | xargs -r kill -9 >/dev/null 2>&1
+			rm -f "$TMP_PATH/${test_flag}"*.*
+			if [ "${_proxy_status}" -eq 200 ]; then
+				exit 0
+			fi
+		}
+		exit 1
+	)
 }
 
 try_switch_backup() {
@@ -122,23 +129,23 @@ try_switch_backup() {
 		if test_node ${new_node}; then
 			check_process
 			log_i18n 0 "Socks switch detection: Port [%s] [%s:[%s]] normal, switch to this node!" "${socks_port}" "${node_type}" "${node_remarks}"
-			NO_REC_PROCESS=1 $APP_FILE socks_node_switch flag=${id} new_node=${new_node}
-			[ $? -eq 0 ] && {
+			if NO_REC_PROCESS=1 "$APP_FILE" socks_node_switch flag="$id" new_node="$new_node" 9>&-; then
 				log_i18n 0 "Socks switch detection: Port [%s] node switch complete!" "${socks_port}"
-			}
-			return 0
+				return 0
+			fi
+			log_i18n 0 "Socks switch detection: Port [%s] node switch failed, continue trying other nodes!" "${socks_port}"
+		else
+			log_i18n 0 "Socks switch detection: Port [%s] [%s:[%s]] abnormal." "${socks_port}" "${node_type}" "${node_remarks}"
 		fi
-		log_i18n 0 "Socks switch detection: Port [%s] [%s:[%s]] abnormal." "${socks_port}" "${node_type}" "${node_remarks}"
 		now_node="$new_node"
 		tried=$((tried + 1))
 	done
 
-	log_i18n 0 "Socks switch detection: Port [%s] all nodes are unavailable!" "${socks_port}"
+	log_i18n 0 "Socks switch detection: Port [%s] all nodes are unavailable or switching failed!" "${socks_port}"
 	return 1
 }
 
 test_auto_switch() {
-	flag=$((flag + 1))
 	local b_nodes=$1
 	local now_node=$2
 	[ -z "$now_node" ] && {
@@ -150,9 +157,7 @@ test_auto_switch() {
 		fi
 	}
 
-	[ $flag -le 1 ] && main_node=$now_node
-
-	local status=$(test_proxy)
+	local status=$(test_proxy 9>&-)
 	if [ "$status" = "2" ]; then
 		log_i18n 0 "Socks switch detection: Port [%s] Unable to connect to the network. Please check if the network is working properly!" "${socks_port}"
 		return 2
@@ -163,13 +168,13 @@ test_auto_switch() {
 		test_node ${main_node}
 		[ $? -eq 0 ] && {
 			check_process
-			# The main node is working properly; switch to the main node.
 			log_i18n 0 "Socks switch detection: Port [%s] Primary node [%s: [%s]] is normal. Switch to the primary node!" "${socks_port}" "$(config_n_get $main_node type)" "$(config_n_get $main_node remarks)"
-			NO_REC_PROCESS=1 $APP_FILE socks_node_switch flag=${id} new_node=${main_node}
-			[ $? -eq 0 ] && {
+			if NO_REC_PROCESS=1 "$APP_FILE" socks_node_switch flag="$id" new_node="$main_node" 9>&-; then
 				log_i18n 0 "Socks switch detection: Port [%s] node switch complete!" "${socks_port}"
-			}
-			return 0
+				return 0
+			fi
+			log_i18n 0 "Socks switch detection: Port [%s] failed to restore the primary node!" "${socks_port}"
+			status=1
 		}
 	fi
 
@@ -186,6 +191,8 @@ test_auto_switch() {
 start() {
 	id=$1
 	LOCK_FILE=${LOCK_PATH}/${CONFIG}_socks_auto_switch_${id}.lock
+	exec 9>"$LOCK_FILE"
+	flock -n 9 || return 0
 	main_node=$(config_n_get $id node)
 	socks_port=$(config_n_get $id port 0)
 	delay=$(config_n_get $id autoswitch_testing_time 30)
@@ -201,7 +208,10 @@ start() {
 			[ "$main_node" = "$backup_node" ] && return
 		elif [ "$backup_node_num" -gt 1 ]; then
 			[ "$restore_switch" != "1" ] && {
-				[ -z "$(echo $backup_node | grep -F "$main_node")" ] && backup_node="${backup_node} ${main_node}"
+				case " $backup_node " in
+					*" $main_node "*) ;;
+					*) backup_node="${backup_node} ${main_node}" ;;
+				esac
 			}
 		fi
 	else
@@ -209,15 +219,9 @@ start() {
 		return
 	fi
 	while [ -n "$backup_node" ]; do
-		[ -f "$LOCK_FILE" ] && {
-			sleep 6s
-			continue
-		}
 		check_process
-		touch $LOCK_FILE
 		test_auto_switch "$backup_node"
-		rm -f $LOCK_FILE
-		sleep ${delay}
+		sleep ${delay} 9>&-
 	done
 }