I have noticed that the status of a hunter’s pet, when in group
will sometimes not update at all.
Usually when zoning i think, and also if hunter changes pet.
Pets HP will not move, if pet is changed, UI still shows old pet.
/reload fixes it right up, but you have to make sure to /reload entering any instances, or crossing zones out in the world.
Can nearly guarantee to make it happen by having the hunter join group when he is in another zone, and them come to your zone to join you.
/reload works around it fine, but is kind of annoying to have to do.
Does not happen to player avatars only pets.
Unsure if it also happens to warlocks minions as i have not found the opportunity to see.