diff --git a/app/src/main/kotlin/li/songe/gkd/data/RawSubscription.kt b/app/src/main/kotlin/li/songe/gkd/data/RawSubscription.kt
index 1665a488e..b66aaf29d 100644
--- a/app/src/main/kotlin/li/songe/gkd/data/RawSubscription.kt
+++ b/app/src/main/kotlin/li/songe/gkd/data/RawSubscription.kt
@@ -570,11 +570,11 @@ data class RawSubscription(
             }
             subscription.apps.forEach { a ->
                 a.groups.findDuplicatedItem { v -> v.key }?.let { v ->
-                    error("duplicated app group: key=${v.key}")
+                    error("duplicated app group: key=${v.key}, appId=${a.id}")
                 }
                 a.groups.forEach { g ->
                     g.rules.findDuplicatedItem { v -> v.key }?.let { v ->
-                        error("duplicated app rule: key=${v.key}, groupKey=${g.key}, appId=${a.id} ")
+                        error("duplicated app rule: key=${v.key}, groupKey=${g.key}, appId=${a.id}")
                     }
                 }
             }
diff --git a/app/src/main/kotlin/li/songe/gkd/service/AbExt.kt b/app/src/main/kotlin/li/songe/gkd/service/AbExt.kt
index a7dd5bc4c..30ef5091b 100644
--- a/app/src/main/kotlin/li/songe/gkd/service/AbExt.kt
+++ b/app/src/main/kotlin/li/songe/gkd/service/AbExt.kt
@@ -170,6 +170,7 @@ val abTransform = Transform(
         sequence {
             val stack = getChildren(node).toMutableList()
             if (stack.isEmpty()) return@sequence
+            stack.reverse()
             val tempNodes = mutableListOf<AccessibilityNodeInfo>()
             do {
                 val top = stack.removeLast()
diff --git a/app/src/main/kotlin/li/songe/gkd/service/AbState.kt b/app/src/main/kotlin/li/songe/gkd/service/AbState.kt
index 9aadd45fd..10eda147f 100644
--- a/app/src/main/kotlin/li/songe/gkd/service/AbState.kt
+++ b/app/src/main/kotlin/li/songe/gkd/service/AbState.kt
@@ -2,6 +2,8 @@ package li.songe.gkd.service
 
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
 import li.songe.gkd.appScope
 import li.songe.gkd.data.AppRule
 import li.songe.gkd.data.ClickLog
@@ -102,25 +104,28 @@ var lastTriggerRule: ResolvedRule? = null
 var lastTriggerTime = 0L
 var appChangeTime = 0L
 
+val clickLogMutex = Mutex()
 fun insertClickLog(rule: ResolvedRule) {
     appScope.launchTry(Dispatchers.IO) {
-        val clickLog = ClickLog(
-            appId = topActivityFlow.value.appId,
-            activityId = topActivityFlow.value.activityId,
-            subsId = rule.subsItem.id,
-            subsVersion = rule.rawSubs.version,
-            groupKey = rule.group.key,
-            groupType = when (rule) {
-                is AppRule -> SubsConfig.AppGroupType
-                is GlobalRule -> SubsConfig.GlobalGroupType
-            },
-            ruleIndex = rule.index,
-            ruleKey = rule.key,
-        )
-        DbSet.clickLogDao.insert(clickLog)
-        increaseClickCount()
-        if (recordStoreFlow.value.clickCount % 100 == 0) {
-            DbSet.clickLogDao.deleteKeepLatest()
+        clickLogMutex.withLock {
+            increaseClickCount()
+            val clickLog = ClickLog(
+                appId = topActivityFlow.value.appId,
+                activityId = topActivityFlow.value.activityId,
+                subsId = rule.subsItem.id,
+                subsVersion = rule.rawSubs.version,
+                groupKey = rule.group.key,
+                groupType = when (rule) {
+                    is AppRule -> SubsConfig.AppGroupType
+                    is GlobalRule -> SubsConfig.GlobalGroupType
+                },
+                ruleIndex = rule.index,
+                ruleKey = rule.key,
+            )
+            DbSet.clickLogDao.insert(clickLog)
+            if (recordStoreFlow.value.clickCount % 100 == 0) {
+                DbSet.clickLogDao.deleteKeepLatest()
+            }
         }
     }
 }
diff --git a/app/src/main/kotlin/li/songe/gkd/service/GkdAbService.kt b/app/src/main/kotlin/li/songe/gkd/service/GkdAbService.kt
index 5318f761e..a79237aef 100644
--- a/app/src/main/kotlin/li/songe/gkd/service/GkdAbService.kt
+++ b/app/src/main/kotlin/li/songe/gkd/service/GkdAbService.kt
@@ -5,10 +5,10 @@ import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
-import android.content.pm.PackageManager
 import android.graphics.Bitmap
 import android.graphics.PixelFormat
 import android.os.Build
+import android.util.LruCache
 import android.view.Display
 import android.view.View
 import android.view.WindowManager
@@ -56,6 +56,7 @@ import li.songe.gkd.util.subsItemsFlow
 import li.songe.gkd.util.updateStorage
 import li.songe.gkd.util.updateSubscription
 import li.songe.selector.Selector
+import java.util.concurrent.Executors
 import kotlin.coroutines.resume
 import kotlin.coroutines.suspendCoroutine
 
@@ -75,7 +76,7 @@ class GkdAbService : CompositionAbService({
     val shizukuGrantFlow = MutableStateFlow(false)
     var lastCheckShizukuTime = 0L
     onAccessibilityEvent { // 借助无障碍轮询校验 shizuku 权限
-        if (storeFlow.value.enableService && it.eventType == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {// 筛选降低判断频率
+        if (storeFlow.value.enableShizuku && it.eventType == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {// 筛选降低判断频率
             val t = System.currentTimeMillis()
             if (t - lastCheckShizukuTime > 5000L) {
                 lastCheckShizukuTime = t
@@ -93,32 +94,37 @@ class GkdAbService : CompositionAbService({
 
     // 当锁屏/上拉通知栏时, safeActiveWindow 没有 activityId, 但是此时 shizuku 获取到是前台 app 的 appId 和 activityId
     fun getShizukuTopActivity(): TopActivity? {
+        if (!storeFlow.value.enableShizuku) return null
         // 平均耗时 5 ms
         val top = safeGetTasksFc()?.lastOrNull()?.topActivity ?: return null
         return TopActivity(appId = top.packageName, activityId = top.className)
     }
 
+    val activityCache = object : LruCache<Pair<String, String>, Boolean>(128) {
+        override fun create(key: Pair<String, String>): Boolean {
+            return kotlin.runCatching {
+                packageManager.getActivityInfo(
+                    ComponentName(
+                        key.first, key.second
+                    ), 0
+                )
+            }.getOrNull() != null
+        }
+    }
+
     fun isActivity(
         appId: String,
         activityId: String,
     ): Boolean {
         if (appId == topActivityFlow.value.appId && activityId == topActivityFlow.value.activityId) return true
-        val r = (try {
-            packageManager.getActivityInfo(
-                ComponentName(
-                    appId, activityId
-                ), 0
-            )
-        } catch (e: PackageManager.NameNotFoundException) {
-            null
-        } != null)
-        return r
+        val cacheKey = Pair(appId, activityId)
+        return activityCache.get(cacheKey)
     }
 
     var lastTriggerShizukuTime = 0L
     var lastContentEventTime = 0L
     val queryThread = Dispatchers.IO.limitedParallelism(1)
-    val eventThread = Dispatchers.IO.limitedParallelism(1)
+    val eventExecutor = Executors.newSingleThreadExecutor()
     onDestroy {
         queryThread.cancel()
     }
@@ -201,8 +207,12 @@ class GkdAbService : CompositionAbService({
         val evActivityId = fixedEvent.className
 
 
-        scope.launch(eventThread) {
-            val eventNode = event.source ?: return@launch
+        eventExecutor.execute launch@{
+            val eventNode = if (event.className == null) {
+                null // https://github.com/gkd-kit/gkd/issues/426 event.clear 已被系统调用
+            } else {
+                event.source
+            }
             val oldAppId = topActivityFlow.value.appId
             val rightAppId = if (oldAppId == evAppId) {
                 oldAppId
@@ -218,7 +228,7 @@ class GkdAbService : CompositionAbService({
                         )
                     }
                 } else {
-                    if (fixedEvent.time - lastTriggerShizukuTime > 300) {
+                    if (storeFlow.value.enableShizuku && fixedEvent.time - lastTriggerShizukuTime > 300) {
                         val shizukuTop = getShizukuTopActivity()
                         if (shizukuTop != null && shizukuTop.appId == rightAppId) {
                             if (shizukuTop.activityId == evActivityId) {
@@ -297,12 +307,12 @@ class GkdAbService : CompositionAbService({
     }
 
     var lastUpdateSubsTime = 0L
-    onAccessibilityEvent {
+    onAccessibilityEvent {// 借助 无障碍事件 触发自动检测更新
         if (it.eventType == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {// 筛选降低判断频率
-            // 借助 无障碍事件 触发自动检测更新
             val i = storeFlow.value.updateSubsInterval
+            if (i <= 0) return@onAccessibilityEvent
             val t = System.currentTimeMillis()
-            if (i > 0 && t - lastUpdateSubsTime > i.coerceAtLeast(60 * 60_000)) {
+            if (t - lastUpdateSubsTime > i.coerceAtLeast(60 * 60_000)) {
                 lastUpdateSubsTime = t
                 checkSubsUpdate()
             }