Screensharing doesn't work on wayland

Unable to screenshare at all on Bazzite (Wayland) -- doesn't seem to matter if I try it from appimage or browser (tried both Waterfox and Ungoogled Chromium), audio or not, it all fails. The appimage fails worse, though; it brings up the screen/window selector (in Wayland) twice, then just silently does nothing. Both browsers only brought up a single screen/window selector, then recognized that screenshare was allegedly happening (the Stop Sharing button was available) but nothing was visible on either my end or the other person's. Tested in both DMs and a community voice channel.