Hello! Sorry about that, I'm not entirely sure what might be causing that; but it seems like it's having some issues with sending messages back and forth between different parts of the app.
Would you be able to try changing the "Browser Source Port" in the Settings to another number (it can even be just up or down 1 number), just in case that port is being used by something else, then try restarting things and seeing if there's any difference?