Web apps created with Librewolf (flatpak) don't remember certain settings

I'm observing some odd settings regressions in web apps using the flatpak version of LibreWolf.

One big one in particular is this:
General -> Tabs -> Opening -> `Open links in tabs instead of new windows` often resets upon closing/reopening the web app.

I've also run into issues where it forgets/deletes stored bookmarks.