Preferences dialog causes crash in flatpak version of Snorca

[acercanto]

When opening Preferences, the program crashes. Repeatable.
Only happens with flatpak version. appimage version works as intended.

My environment:
Ubuntu 24.04.3 LTS
Gnome desktop

In top left of window, click the burger next to File, click on Preferences. Also happens when using keyboard shortcut Ctrl+P.

[zoncky]

It happens as well on Fedora Workstation 43 - Gnome. Also:

• the flatpak doesn't follow the dark theme (Adwaita-dark) for legacy applications. (It's ok on 2.2.3)
• login/passwords are not saved on exit.

Appimage works as it should for preferences menu and dark theme. Still login/passwords are not saved.