App crash after some time without any reason

[UbaidBodla]

App crash after some time (after 2,3 minutes )don't know why after screen lock
basically, I want to send msg by the telegram bot when I found a notification from a certain app and it always remains in the background.
My project is here
https://github.com/UbaidBodla/bot_project

EXCEPTION I am facing is:

Maybe I am using it in the wrong way.
Thanks

Ignore my English

[UbaidBodla]

here is the error

[UbaidBodla]

@JulianAssmann Please help me.

Maney Time it send an EXCEPTION like

Tried to send a platform message to Flutter, but FlutterJNI was detached from native C++. Could not send. Channel: notifications. Response ID: 299
W/FlutterJNI( 5389): Tried to send a platform message to Flutter, but FlutterJNI was detached from native C++. Could not send. Channel: notifications. Response ID: 293

Didn't know why?

[JulianAssmann]

On which phone did you test this on?