I am having this problem with my Endless Cat Tonic and another guy posted a similar problem with his Endless Mystery Tonic. At first it would only freeze GW2 but now it just crashes. Since it would freeze the game I couldn’t send a crash report but now I’ll force a crash and hopefully send one. It also happens in a zerg fight so I guess it’s something about the transformation animation (that whirlwind and stuff). It is driving me mad already, can’t even try to get the fat cat transformation without the fear of crashing.