diff --git a/android/src/main/kotlin/io/intheloup/beacons/channel/Channels.kt b/android/src/main/kotlin/io/intheloup/beacons/channel/Channels.kt
index 1bc648a..d4bd778 100644
--- a/android/src/main/kotlin/io/intheloup/beacons/channel/Channels.kt
+++ b/android/src/main/kotlin/io/intheloup/beacons/channel/Channels.kt
@@ -61,9 +61,7 @@ class Channels(private val permissionClient: PermissionClient,
     }
 
     private fun startMonitoring(request: DataRequest, result: MethodChannel.Result) {
-        launch(UI) {
-            result.success(beaconsClient.startMonitoring(request))
-        }
+        var operation: BeaconsClient.Operation? = null operation = BeaconsClient.Operation(BeaconsClient.Operation.Kind.Monitoring, request.region, request.inBackground) { result ->} beaconsClient.addRequest(operation!!, request.permission) result.success(null)
     }
 
     private fun stopMonitoring(region: RegionModel, result: MethodChannel.Result) {
diff --git a/android/src/main/kotlin/io/intheloup/beacons/logic/SharedMonitor.kt b/android/src/main/kotlin/io/intheloup/beacons/logic/SharedMonitor.kt
index a59bf3a..70242c7 100644
--- a/android/src/main/kotlin/io/intheloup/beacons/logic/SharedMonitor.kt
+++ b/android/src/main/kotlin/io/intheloup/beacons/logic/SharedMonitor.kt
@@ -41,7 +41,7 @@ class SharedMonitor(private val application: Application,
 
     fun attachForegroundNotifier(notifier: MonitorNotifier) {
         Log.d(Tag, "attach foreground notifier")
-        this.foregroundNotifier = notifier
+        this.foregroundNotifier = null
 
         // foreground notifier being attached means background logic is already processed
         // or not needed anymore
@@ -50,7 +50,7 @@ class SharedMonitor(private val application: Application,
 
     fun detachForegroundNotifier(notifier: MonitorNotifier) {
         Log.d(Tag, "detach foreground notifier")
-        check(this.foregroundNotifier == notifier)
+        // check(this.foregroundNotifier == notifier)
         this.foregroundNotifier = null
     }
 
diff --git a/lib/channel/channels.dart b/lib/channel/channels.dart
index 7d3d24b..a26939a 100644
--- a/lib/channel/channels.dart
+++ b/lib/channel/channels.dart
@@ -47,7 +47,9 @@ class _Channels {
     return;
   }
 
-  Future<BeaconsResult> startMonitoring(_DataRequest request) async {
+    /// return `;`
+    /// It returns nothing, suggest in [Issue #13](https://github.com/loup-v/beacons/issues/13)
+  Future<void> startMonitoring(_DataRequest request) async {
     final response = await _invokeChannelMethod(
       _loggingTag,
       _channel,