Sound and image missing

Hi,

We are using meet.jit.si for our school online classrooms since 16/03/2020.
It was working fine until few days ago.
We are now recording a lot of issues of sound and image missing.

Questions:

  1. Is there a known issue on the server-side that I can share to all the teachers and students ?
  2. Is there some kind of “heartbeat” page on the jitsi.org site that shows how stable the system is and the issues it could have ?

Thanks in advance.
Eric