notes.sqlite: "Unable to establish a database connection with file" after first launch

I reported the issue [here](https://github.com/pbek/QOwnNotes/issues/2901) but it seems only the flatpak version is affected...
Still present with version 23.11.2 - GitHub - build 1063.

To recap:
>Using the flatpak version (QOwnNotes - version 23.11.1 - GitHub - build 1062), trying to open the app, it greets me with the message: "Unable to establish a database connection with file '/run/user/1000/doc/ff2a565b/Notes/notes.sqlite'. Are the folder and the file writeable?"
>Entering the flatpak environment with flatpak enter org.qownnotes.QOwnNotes bash, and issuing the command ls -al /run/user/1000/doc/ff2a565b/Notes/ it reports:
>`-rw-r--r-- 1 tesx tesx 0 Nov 11 09:41 notes.sqlite`
>So the file is indeed writable.
> [...]
>So I tried to delete the file and run the app again and no message were shown this time and the file was recreated (but still empty).
>Closing the app, and restarting it, the message reappeared...

With the app installed from ArchLinux's AUR, it does create the new file correctly (and it doesn't complain afterwards)...