Hi, @aligreenman - I've heard a number of issues regarding breakout rooms in the last week or so.
One question: Is this a "long meeting" where the issues come after the meeting has been active for hours, perhaps? This is the one thing I've heard as a common thread among some of the recent issues.
Secondly... I highly recommend posting the details of your situation to Zoom Support. Here in the Zoom Community, we're mostly volunteers with no access to any "back-end" details for troubleshooting, whereas they have access to, well, everything. Here's where you can create a Zoom Support Request:
https://support.zoom.us/hc/en-us/requests/new
Please come back here and post more info once you hear something from the Zoom Support staff. It could be useful information for others experiencing similar issues.