Need help with flatpak (goldendict-ng)

I’ve installed goldendict-ng from flathub because f43 repos don’t have the latest. But when I add the dictionary folder for it to scan it transforms the original path into a /run/user/… folder.
Problem is it took a long time to scan all dictionaries and then next time I opened the app there were no dictionaries indexed because the /run.. path had changed.
Now I don’t want to scan and index again if it won’t persist.
I tried to add some filesystem access permission (like for all user files) but goldendict-ng still transforms the path into a /run folder.
The whole issue is at flatpak loses indexed dictionaries (changes location). · xiaoyifang/goldendict-ng · Discussion #2696 · GitHub
But I though about asking here as I’m not familiar with this flatpak behaviour and didn’t get any answer there yet.
Any insights are appreciated.

Edit: I eventually removed the flatpak and installed from the repo, which works as usual.

Welcome to Fedora @kunzlata

Next time you can answer your selves (as I made it for you) and mark the answer as a solution. This way we find it when we do search after solved issues.

If you still want to do it, feel free to do so.