As many others have already posted. Both here and on the US forums the game seem to have a severe memory leak after 8.3. I can run around fine for a decent amount of time with rock solid fps and all of a sudden for seemingly no reason the fps drops to 0. The cursor still works and everything else seems fine but the game remains frozen for about 5-10 sec until it picks back up. This started happening just after the patch to 8.3. Was also a showing up on the PTR.