diff --git a/packages/neuron-wallet/src/controllers/networks/index.ts b/packages/neuron-wallet/src/controllers/networks/index.ts
index 6e39bd9666..4a48ba6f19 100644
--- a/packages/neuron-wallet/src/controllers/networks/index.ts
+++ b/packages/neuron-wallet/src/controllers/networks/index.ts
@@ -1,13 +1,13 @@
 import { dialog } from 'electron'
 import { t } from 'i18next'
 import env from 'env'
-import { skip, distinctUntilChanged, debounceTime } from 'rxjs/operators'
+import { distinctUntilChanged, skip } from 'rxjs/operators'
 import { NetworkType, Network } from 'models/network'
 import NetworksService from 'services/networks'
 import NodeService from 'services/node'
 import { ResponseCode } from 'utils/const'
 import { IsRequired, InvalidName, NetworkNotFound, CurrentNetworkNotSet } from 'exceptions'
-import { switchToNetwork } from 'block-sync-renderer'
+import { resetSyncTaskQueue, switchToNetwork } from 'block-sync-renderer'
 import { CurrentNetworkIDSubject, NetworkListSubject } from 'models/subjects/networks'
 import ChainInfo from './chain-info'
 import logger from 'utils/logger'
@@ -18,7 +18,7 @@ export default class NetworksController {
   public async start() {
     NodeService.getInstance()
       .connectionStatusSubject // TODO: find out the redundant message and remove skip
-      .pipe(distinctUntilChanged(), debounceTime(3000), skip(1))
+      .pipe(distinctUntilChanged(), skip(1))
       .subscribe(async (connected: boolean) => {
         if (connected) {
           await networksService.update(networksService.getCurrentID(), {})
@@ -26,6 +26,7 @@ export default class NetworksController {
           await this.connectToNetwork(true)
         } else {
           logger.debug('Network:\tconnection dropped')
+          resetSyncTaskQueue.push(false)
         }
       })
 
diff --git a/packages/neuron-wallet/src/main.ts b/packages/neuron-wallet/src/main.ts
index e3eea64fae..d9f8c57179 100644
--- a/packages/neuron-wallet/src/main.ts
+++ b/packages/neuron-wallet/src/main.ts
@@ -10,12 +10,14 @@ const appController = AppController.getInstance()
 const singleInstanceLock = app.requestSingleInstanceLock()
 if (singleInstanceLock) {
   app.on('ready', async () => {
+    logger.info('App:\tNeuron is starting')
     changeLanguage(SettingsService.getInstance().locale)
 
     appController.start()
   })
 
   app.on('before-quit', async () => {
+    logger.info('App:\tNeuron will exist')
     await appController.end()
   })
 
diff --git a/packages/neuron-wallet/src/services/ckb-runner.ts b/packages/neuron-wallet/src/services/ckb-runner.ts
index e8c07f814a..20c24d05df 100644
--- a/packages/neuron-wallet/src/services/ckb-runner.ts
+++ b/packages/neuron-wallet/src/services/ckb-runner.ts
@@ -6,7 +6,6 @@ import process from 'process'
 import logger from 'utils/logger'
 import SettingsService from './settings'
 import MigrateSubject from 'models/subjects/migrate-subject'
-import { resetSyncTaskQueue } from 'block-sync-renderer'
 import IndexerService from './indexer'
 
 const platform = (): string => {
@@ -126,14 +125,12 @@ export const startCkbNode = async () => {
     isLookingValidTarget = false
     ckb = null
   })
-  resetSyncTaskQueue.push(true)
 
   removeOldIndexerIfRunSuccess()
 }
 
 export const stopCkbNode = () => {
   return new Promise<void>(resolve => {
-    resetSyncTaskQueue.push(false)
     if (ckb) {
       logger.info('CKB:\tkilling node')
       ckb.once('close', () => resolve())