diff --git a/src/main/config/app.ts b/src/main/config/app.ts
index 443c843..5418932 100644
--- a/src/main/config/app.ts
+++ b/src/main/config/app.ts
@@ -9,14 +9,16 @@ let appConfigWriteQueue: Promise<void> = Promise.resolve()
 
 export async function getAppConfig(force = false): Promise<IAppConfig> {
   if (force || !appConfig) {
-    const data = await readFile(appConfigPath(), 'utf-8')
-    const parsedConfig = parse(data)
-    const mergedConfig = deepMerge({ ...defaultConfig }, parsedConfig || {})
-    if (JSON.stringify(mergedConfig) !== JSON.stringify(parsedConfig)) {
-      await writeFile(appConfigPath(), stringify(mergedConfig))
-    }
-
-    appConfig = mergedConfig
+    appConfigWriteQueue = appConfigWriteQueue.then(async () => {
+      const data = await readFile(appConfigPath(), 'utf-8')
+      const parsedConfig = parse(data)
+      const mergedConfig = deepMerge({ ...defaultConfig }, parsedConfig || {})
+      if (JSON.stringify(mergedConfig) !== JSON.stringify(parsedConfig)) {
+        await writeFile(appConfigPath(), stringify(mergedConfig))
+      }
+      appConfig = mergedConfig
+    })
+    await appConfigWriteQueue
   }
   if (typeof appConfig !== 'object') appConfig = defaultConfig
   return appConfig
diff --git a/src/main/core/profileUpdater.ts b/src/main/core/profileUpdater.ts
index f3f3aee..b500e74 100644
--- a/src/main/core/profileUpdater.ts
+++ b/src/main/core/profileUpdater.ts
@@ -3,6 +3,7 @@ import { Cron } from 'croner'
 import { logger } from '../utils/logger'
 
 const intervalPool: Record<string, Cron | NodeJS.Timeout> = {}
+const delayedUpdatePool: Record<string, NodeJS.Timeout> = {}
 
 async function updateProfile(id: string): Promise<void> {
   const item = await getProfileItem(id)
@@ -61,8 +62,9 @@ export async function initProfileUpdater(): Promise<void> {
         currentItem.interval * 60 * 1000
       )
 
-      setTimeout(
+      delayedUpdatePool[currentId] = setTimeout(
         async () => {
+          delete delayedUpdatePool[currentId]
           try {
             await updateProfile(currentId)
           } catch (e) {
@@ -132,4 +134,8 @@ export async function removeProfileUpdater(id: string): Promise<void> {
     }
     delete intervalPool[id]
   }
+  if (delayedUpdatePool[id]) {
+    clearTimeout(delayedUpdatePool[id])
+    delete delayedUpdatePool[id]
+  }
 }
diff --git a/src/main/sys/ssid.ts b/src/main/sys/ssid.ts
index 823d089..82c4e0e 100644
--- a/src/main/sys/ssid.ts
+++ b/src/main/sys/ssid.ts
@@ -32,6 +32,8 @@ export async function getCurrentSSID(): Promise<string | undefined> {
 }
 
 let lastSSID: string | undefined
+let ssidCheckInterval: NodeJS.Timeout | null = null
+
 export async function checkSSID(): Promise<void> {
   try {
     const { pauseSSID = [] } = await getAppConfig()
@@ -56,8 +58,18 @@ export async function checkSSID(): Promise<void> {
 }
 
 export async function startSSIDCheck(): Promise<void> {
+  if (ssidCheckInterval) {
+    clearInterval(ssidCheckInterval)
+  }
   await checkSSID()
-  setInterval(checkSSID, 30000)
+  ssidCheckInterval = setInterval(checkSSID, 30000)
+}
+
+export function stopSSIDCheck(): void {
+  if (ssidCheckInterval) {
+    clearInterval(ssidCheckInterval)
+    ssidCheckInterval = null
+  }
 }
 
 async function getSSIDByAirport(): Promise<string | undefined> {