Some time ago Diablo 4 received a patch that added pets to the game. However, as it always happens with Blizzard, the update was not without problems.
The thing is that the pets turned out to be regular minions, which created certain problems for players playing as Necromancers. The game can not accurately determine the number of summoned creatures of the hero, because of which the damage inflicted by the minions sags in the numbers. Of course, pets are quite useful, but, as it turns out, in battles they can also hurt.
The developers are already aware of the problem and promise to fix it in the near future...I guess.