Unable to assign a participant to a breakout room

[jd9]

We held a recurring meeting yesterday and had roughly 50 people preassigned to various breakout rooms.  During the meeting, we broke out into the preset rooms, however we had 3 people who did not automatically get assigned.  The host and co-hosts were not able to move them into a breakout room at all.  We verified their zoom email with the one we had set in the breakout room and it was correct.  

We did not have the option to manually assign this person to a room and they were not showing up as an unassigned participant.  We had the person log out and log back in and that did not fix the issue.  

This is a recurring meeting with the same registrants and we did not have this issue last week.  Any ideas?