I’ve noted that the current Zoom flatpak fails if it’s allowed to run in the background. You’re best advised to amend the app settings accordingly.
Zoom on Fedora SliverBlue (Atomic desktop)
Thanks for the advice. I’ve done that now.
On reflection I realise this behaviour is probably because background-ing Zoom requires writing something to the OS layer, which can’t be done as that is read-only. If that’s so, the ‘fix’ would be just to turn off background running when using any immutable OS version.