A lot of 14* star weapons seem to glitch up the interface where my mouse disappears, the selection becomes a grey box which hides the item I am currently on. It is not even consistent as I can be in one shop with this issue and then the next shop doesn't have the issue. It seems to be a lot worse when trying to look at weapons that I can't equip on my current class.
It's very weird. I tried restarting game, computer, etc. Still the same and still weird. When it does this, even the message you get trying to get out of the shop does not appear and I have to blindly press on cancelling the purchase as if the little pop-up was there. I haven't seen anyone else report this so I thought I'd post here.