Of course it's an MSFS SU2 Beta bug, and we had to act quickly on it, because without our FIX, it would cause a completely unreadable menu with microscopic tiny fonts, which was way worse than a "slightly" different font size that, as you can see, depending on the resolution used, might be perfect, better than before or worse, because the only FIX for that bug was to set a fixed font size, so at least you would see something.
Since this problem doesn't affect only GSX but several other apps with a Toolbar menu, on a recent post on their devs forum, Asobo promised the problem with UI scaling, which happened with MSFS 2024 SU2 Beta and we had to act quickly on to prevent a way worse issue of tiny unreadable fonts, should be fixed in the final version or in a newer beta, so assuming it will be fixed, we can go back to the previous version of the menu which supported UI scaling.