Changing subtitle/audio doesn't trigger changedSubtitles or changedTrack event

[nateshmbhat]

sample track to test : http://sample.vodobox.com/planete_interdite/planete_interdite_alternate.m3u8

test code :

vidController.addEventsListener((event) {
        final eventType = event.betterPlayerEventType;

        switch (eventType) {
          case BetterPlayerEventType.initialized:
            videoLog.i('BetterPlayerEventType.initialized');
            break;
          case BetterPlayerEventType.changedTrack:
            videoLog
                .i('BetterPlayerEventType.changedTrack : ${event.parameters}');
            break;
          case BetterPlayerEventType.changedSubtitles:
            videoLog.i(
                'BetterPlayerEventType.changedSubtitles : ${event.parameters}');
            break;
          case BetterPlayerEventType.bufferingUpdate:
          case BetterPlayerEventType.bufferingStart:
          case BetterPlayerEventType.bufferingEnd:
          case BetterPlayerEventType.progress:
            break;
          default:
            videoLog.i('BetterPlayerEventType.event: ${eventType}');
            break;
        }
      });

final controller = BetterPlayerController(
        BetterPlayerConfiguration(
          autoDispose: true,
          autoPlay: true,
          looping: true,
          aspectRatio: screenAspectRatio,
          subtitlesConfiguration: const BetterPlayerSubtitlesConfiguration(
              fontSize: 24,
              fontFamily: sFontFedraSerif,
              fontColor: Colors.blue,
              outlineEnabled: true,
              backgroundColor: Colors.white),
          controlsConfiguration: const BetterPlayerControlsConfiguration(
            enableFullscreen: false,
            enableSubtitles: true,
            showControls: true,
            showControlsOnInitialize: false,
          ),
          fit: BoxFit.contain,
        ),
        betterPlayerDataSource: BetterPlayerDataSource(
          BetterPlayerDataSourceType.network,
          videoDataModel.videoUrl,
          useAsmsAudioTracks: true,
          useAsmsSubtitles: true,
          useAsmsTracks: true,
          videoFormat: 'hls',
      );
      return controller;
    }, const []);

    useEffect(() {
      vidController.addEventsListener((event) {
        final eventType = event.betterPlayerEventType;

        switch (eventType) {
          case BetterPlayerEventType.initialized:
            videoLog.i('BetterPlayerEventType.initialized');
            break;
          case BetterPlayerEventType.changedTrack:
            videoLog
                .i('BetterPlayerEventType.changedTrack : ${event.parameters}');
            break;
          case BetterPlayerEventType.changedSubtitles:
            videoLog.i(
                'BetterPlayerEventType.changedSubtitles : ${event.parameters}');
            break;
          case BetterPlayerEventType.bufferingUpdate:
          case BetterPlayerEventType.bufferingStart:
          case BetterPlayerEventType.bufferingEnd:
          case BetterPlayerEventType.progress:
            break;
          default:
            videoLog.i('BetterPlayerEventType.event: ${eventType}');
            break;
        }
      });
      return () {
        vidController.removeEventsListener((e) {});
      };
    }, [vidController]);

expected behavior is :
changing subtitles from the default controls overflow menu should trigger changedSubtitles event.

Current behavior is :
event not triggered. Same issue for audio track change also.