When I switch between windows while listening to a presentation, the BBB chat seems to freeze and not unfreeze. It also slows down slide display / screensharing. When I go to a different application and back to the presentation, the page updates. Interestingly, the audio is coming through loud and clear and is not interrupted at all.
Refreshing the page seems to solve the problem. Is there any other trick besides really staying just in that window?
(using Firefox 20)