How to stop trigger working in the other page in flutter?

Question

Hi team I'm working on handheld reader to read the tags by pressing the trigger in the handheld reader.

I'm implementing this but the issue is after i got one tag i need to navigate to one screen if the tag is valid means i can able to navigate to the screen but the issue is in that navigated screen if i press the trigger its working there and start to scan the tag how to avoid this ?

void startListening() {
    subscription = myplugin.stream.listen((event) async {
      if (event == HardwareButton.trigger) {
        {
          if (!context.read<MyCubit>().state.isScanning) {
            await context.read<MyCubit>().startScan();
            await Future.delayed(const Duration(milliseconds: 500));
            await _tagsChecking();
          } else {
            context.read<MyCubit>().stopSession();
          }
        }
      }
    });
  }

  void stopListening() {
    subscription?.cancel();
  }

  @override
  void dispose() {
    super.dispose();
    stopListening();
  }

 await Navigator.push(
              context,
              MyHomePage.routeFromPage(
                  RouteSettings(arguments: animals.entries.first.value)),
            ); 

so if the tag is valid it needs to navigated to the above screen but the issue is trigger working even i reached the above page how to fix this

I'm unable to paste full code due to restrictions I'm facing this issue seriously please help