App crashes on amazon firestick android-9

[zaheermehmood]

Please check below crash detail.
RuntimeException
Failure delivering result ResultInfo{who=null, request=5672353, result=0, data=null} to activity {com.app.splitflap/com.app.splitflap.MainActivity}: java.lang.IllegalStateException: Reply already submitted

IllegalStateException
Reply already submitted

io.flutter.embedding.engine.f.e$g in a at line 4
k.a.c.a.k$a$a in a at line 1
de.julianassmann.flutter_background.c$b in b at line 1
de.julianassmann.flutter_background.c$b in h at line 1
de.julianassmann.flutter_background.b in a at line 4
io.flutter.embedding.engine.d$c in c at line 2
io.flutter.embedding.engine.d in a at line 4
io.flutter.embedding.android.f in o at line 4
io.flutter.embedding.android.e in onActivityResult at line 2
android.app.Activity in dispatchActivityResult at line 7496
android.app.ActivityThread in deliverResults at line 4412
android.app.ActivityThread in handleSendResult at line 4461
android.app.servertransaction.ActivityResultItem in execute at line 49
android.app.servertransaction.TransactionExecutor in executeCallbacks at line 108
android.app.servertransaction.TransactionExecutor in execute at line 68
android.app.ActivityThread$H in handleMessage at line 1824
android.os.Handler in dispatchMessage at line 106
android.os.Looper in loop at line 193
android.app.ActivityThread in main at line 6740
java.lang.reflect.Method in invoke
com.android.internal.os.RuntimeInit$MethodAndArgsCaller in run at line 493
com.android.internal.os.ZygoteInit in main at line 858

android.app.ActivityThread in deliverResults at line 4419
android.app.ActivityThread in handleSendResult at line 4461
android.app.servertransaction.ActivityResultItem in execute at line 49
android.app.servertransaction.TransactionExecutor in executeCallbacks at line 108
android.app.servertransaction.TransactionExecutor in execute at line 68
android.app.ActivityThread$H in handleMessage at line 1824
android.os.Handler in dispatchMessage at line 106
android.os.Looper in loop at line 193
android.app.ActivityThread in main at line 6740
java.lang.reflect.Method in invoke
com.android.internal.os.RuntimeInit$MethodAndArgsCaller in run at line 493
com.android.internal.os.ZygoteInit in main at line 858