java.lang.NullPointerException while app is in backeground around 2 hours than it's getting crashed

[AnilNeodove]

Exception java.lang.NullPointerException: Attempt to read from field 'java.lang.String io.flutter.view.FlutterCallbackInformation.callbackLibraryPath' on a null object reference in method 'java.lang.String io.flutter.embedding.engine.dart.DartExecutor$DartCallback.toString()'
at io.flutter.embedding.engine.dart.DartExecutor$DartCallback.toString
at java.lang.String.valueOf (String.java:3657)
at java.lang.StringBuilder.append (StringBuilder.java:132)
at io.flutter.embedding.engine.dart.DartExecutor.executeDartCallback (DartExecutor.java)
at dev.fluttercommunity.workmanager.BackgroundWorker.startWork$lambda$2 (BackgroundWorker.java)
at dev.fluttercommunity.workmanager.BackgroundWorker.$r8$lambda$6sAKdFC7OiSIMKEvQJlu-u6nOVw (BackgroundWorker.java)
at dev.fluttercommunity.workmanager.BackgroundWorker$$InternalSyntheticLambda$0$1db8b4055b41dbc6f5c5036cb185dab072c44060566ef8e5438a5c3ef071948c$0.run$bridge (BackgroundWorker.java)
at android.os.Handler.handleCallback (Handler.java:942)
at android.os.Handler.dispatchMessage (Handler.java:99)
at android.os.Looper.loopOnce (Looper.java:226)
at android.os.Looper.loop (Looper.java:313)
at android.app.ActivityThread.main (ActivityThread.java:8762)
at java.lang.reflect.Method.invoke
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:604)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1067)