I have the same issues:
1. In one case, the main windows was not responding when selecting scene but the multiviewed windows worked. I was able to select scene and transitioned with hotkey. (did not have the crash report on that).
2. Second case, it was completely frozen though it still seemed to select scenes but the preview or program windows did not change. And eventually had a crashed message. (this was during the livestream for mass so we have to restart the software). I attached the crashed report here so please help.) in the meantime, should i go back to 27.4? thanks