Same ennemy mercenary multiple times in a fight

that’s the first time I face a mercenary encounter with the same ennemy twice in the fight (Mutanus middle and right with different skins)
Just wondering if that already happend to any one, or even if this could be a bug ?

cdn discordapp com/attachments/810550683458863124/1041046326500143184/image.png
(didn’t find a better and fast preview than discord)

I have seen it a few times, only with murlocs though, have seen both double Mutanus, and (more scary) double Old Murk Eye.

I think I’ve seen double Morgls, though I’m not 100% certain (it was a while ago).

It’s a known issue and a duplicate thread: