"Connection to the server was lost" only for the Q&A, not the live event itself (producer/presenters audio/video).
I had a weird abnormality / connectivity issues today during a team’s live event -> re-joining solved it.
At first the desktop content on the bottom (before it was even selected / made “live”) froze, as well as the audio from speakers cut in and out, but then got restored some time after.
BUT I noticed that test questions for the Q&A weren’t showing up for me (Just for other producers and presenters was working fine)
and in my Q&A view it mentioned the connection issue which did not get resolved automatically for the Q&A moderation.
Leaving the event and re-joining solved it(questions appeared and I was able to publish/reply).