Breakout rooms with external participants

hi

we have an on going isssue with external participants' in breakout rooms in a teams meeting. This was all working perfectly prior to August 2024 then the issues have arisen.

Some colleagues use breakroom facility to provide training to 40/50 external users, some can get in no problem, others have major issues. Some come in as unassigned  attendees, thus results in them not being able to see shared screens and also not being able to be allocated into a breakout.

This is obviously very stressful for the person running these session. As I say prior to Aug 2024( which i think was a time of major updates in teams) everything was working perfectly.

All attendees are using the very latest version of teams and we are aware that if they are using the web version breakout rooms can sometimes prove a problem, but they are all using the lastest desktop version.

any thoughts would be most welcome