I agree that Flatpak as the default package format is troublesome more often than not. I tried using VLC at first but then forgot to repeat the same test once I understood the issue.
I've changed the category from Feedback to General Help which should now give you the option to mark one of the posts as the solution. While it's good feedback, rest assured this has been brought up many times
If you are curious, there's a discussion open on this thread:
