Screenshot always crashes in Cinnamon (X11,Flatpak version)

[Heavygrass]

Every time I try to do a screenshot in Cinnamon/X11 with flatpak version of Frog 1.6.0, the app crashes.

Journal right after the crash (likely after 2 Frog screenshot attempts):

systemd[20997]: Started app-flatpak-com.github.tenderowl.frog-3786203.scope.
17:50:14 systemd[20997]: app-flatpak-com.github.tenderowl.frog-3786203.scope: Consumed 1.076s CPU >
17:50:18 xdg-desktop-por[21644]: g_path_get_basename: assertion 'file_name != NULL' failed
17:50:18 xdg-desktop-por[21644]: g_path_get_dirname: assertion 'file_name != NULL' failed
17:50:18 xdg-desktop-por[21644]: Failed to register : Failed to open
17:50:31 systemd[20997]: Started app-flatpak-com.github.tenderowl.frog-3786688.scope.
17:50:33 systemd[20997]: app-flatpak-com.github.tenderowl.frog-3786688.scope: Consumed 1.074s CPU >
17:50:53 xdg-desktop-por[21644]: g_path_get_basename: assertion 'file_name != NULL' failed
17:50:53 xdg-desktop-por[21644]: g_path_get_dirname: assertion 'file_name != NULL' failed
17:50:53 xdg-desktop-por[21644]: Failed to register : Failed to open

Tried restarting services.
Cinnamon 6.0.4 (Ubuntu 24.04 fully updated with HWE kernel)

Frog is run as:
/usr/bin/flatpak run --branch=stable --arch=x86_64 --command=frog com.github.tenderowl.frog

Frog Flatpak version:
Frog com.github.tenderowl.frog 1.6.0 stable system
Kernel 6.14.0-36-generic.
If any more info needed please let me know.
Thanks.