So far the only weirdness on fedora is just kinda adorably weird: every flatpak app seems to crash on first launch. After that, they're fine.
Sadly, being weird proprietary things they don't plug into the crash reporting infrastructure, so who knows what their malfunction is. I don't get any option to report a crash 🤷 coredumpctl has crash dumps for both, discord did a SIGABRT and slack a SIGTRAP (lol)