During the fight against Vex one of her clones got stuck. I was using levitation on the original Vex and clones appeared as she received the spell. It seams that it's one clone who receive it instead. It stayed frozen mid-air for the whole fight (not doing anything though) and I couldn't deselect it. I managed to finish the fight but then the ending dialogue with Vex was blocked too. I couldn't get to the next lines, nor the menu and ended up forcing the game to shut down.
