This unfortunately sounds very like the issue another user reported at https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=884415 which I don't think has a fix.

I'm sure the more people who report it, the higher priority a response from Larian will be, though. To report it to them, you can use the "report a bug" link along the top of the game launcher to take you directly to the right place on their support website.

"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"