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are you observing this exclusively for Safari 17? If so, then likely related! cc @freezing-lifeguard-43174

Yeah, we just tried it with 16.6 and it works. We use this for our room:

defaultScreenShareCaptureOptions: const ScreenShareCaptureOptions(
            useiOSBroadcastExtension: true,
            params: VideoParametersPresets.screenShareH1080FPS30,
          ),

and then this for toggle and setting a new screen sharing track:

LocalTrackPublication<LocalTrack>? localTrackPublication = await room.localParticipant!.setScreenShareEnabled(
        true,
        captureScreenAudio: true,
      );

Do we need to set a default resolution on both places or are we missing something?

you are not missing anything.. this is a bug in Safari 17 (that broke spec).. and we had to workaround it.

Awesome! 👏