I and an associate were in a GoTo training session, both using latest chrome, and when we were transferred to breakout rooms there was an error and it disconnected us entirely.
We then quickly downloaded the app, rejoined the main room, where the presenter tried to again put us in breakout rooms and we were again disconnected with an error.
Didn't screenshot the error but it wasn't descriptive, might have been "unknown error".
As far as I know it only happed to 4 out of 40 or so attendees that were moved to breakouts.
Both of us were using computer audio/mic.