May I refer you to https://forums.larian.com/ubbthreads.php?ubb=postlist&Board=89&page=1 or https://larian.com/support/baldur-s-gate-3#feedback, more appropriate places to list bugs.

Opportunity attack in tabletop D&D is 5ft, not 15. Unless you're talking about the full diameter of the AoO region, but that's a weird way to put it...

To answer your question, my AoOs work fine.