For more context, Zoom incorrectly implemented their screensharing on modern gnu+linux distributions which use Wayland. Zoom did not introduce Wayland support until March 1, 2020 version 3.5.361976.0301. This was broken upon release because they did not use the correct API (gdbus-org.freedesktop.portal.ScreenCast)which has been available since early 2018: https://github.com/flatpak/xdg-desktop-portal/releases/tag/0.10. This resulted in issues for multi-monitor setups, problems with HiDPI screens, unusable performance, and other glitches from the beginning, and now it is broken completely.
Many users are switching to affordable, reliable, backed-by-open-source options like https://8x8.vc, powered by Jitsi (plus, they didn't lie to their users about end-to-end encryption and get sued). The screenshot API exists only for the system to take screenshots (of course). It is very inefficient for video but what's worse is it is also completely insecure because in order for it to be publicly enabled, applications have full access to record your entire screen without explicit permission.
The correct API was designed for video, and gives the user control over sharing specific windows/apps or the entire screen, so no app gets to spy on your screen without your permission. So when Zoom created their implementation they used the wrong API, and for the almost two years since then Zoom still didn't update, ignored the users with issues, did not monitor for deprecating APIs, and did not test upcoming gnu+linux distributions like Fedora to see that the API they use was incorrect, long been deprecated, and imminently disabled. This left many users and developers to do the testing and investigation for them, but still took nine months to be recognized. Finally, they are working on this now, so we will see how long the fix takes.
Here to report similar issues occurring with Slackware x86 and x64 Current and OpenSUSE 😞 - wayland support is becoming very important since most distros enable it by default in 2022- better support would be much appreciated.