Tried to send a platform message to Flutter, but FlutterJNI was detached from native C++. Could not send

I've used pusher_client inside background service via flutter_foreground_task package. Pusher client listen truly inside background service but some time later when message came it gives this error W/FlutterJNI( 5311): Tried to send a platform message to Flutter, but FlutterJNI was detached from native C++. Could not send. Channel: com.github.chinloyal/pusher_client_stream. Response ID: 0 Could anybody help me please.