Patch question

since patch tue my pet keeps randomly dying. he will be full hp and ill be in a dungeon as a example and next thing i know hes gone lol this happening to anyone else?

Yeah blizzard decided our demons were too helpful for us. So now the demons are made entirely out of glass.

Your gear level is lower when compared to your new enemies, and that makes your pet weaker.
Basically, you’ve got to rebuild your armour to the new Heroic or Mythic you were at before the new season to improve your pet’s survivability.