Yup, ran into this issue too this morning when running flatpak update
it just rage quits and puts out a core dump error with no information like this:
[scott@fedora ~]$ flatpak update
Looking for updates…
New org.nickvision.tubeconverter permissions:
file access [1]
[1] xdg-download
ID Branch Op Remote Download
1. [|] org.gnome.Platform master u gnome-nightly 871.6 kB / 346.2 MB
2. [ ] org.nickvision.money stable u flathub < 46.2 MB
3. [ ] io.gitlab.adhami3310.Footage stable u flathub < 24.2 MB
4. [ ] org.nickvision.tubeconverter.Locale stable u flathub < 378.8 kB (partial)
5. [ ] org.nickvision.tubeconverter stable u flathub < 58.5 MB
Updating 1/5… ██ 10% 871.6 kB/sBus error (core dumped)
[scott@fedora ~]$