Anyone else seeing 14k+ One-Shots by enemies?

I am not talking about solo play.
I am not talking about new bosses and the extreme damage they can dish out in multiplayer
I am referring to groups of three or four players.
I am talking about T15 or T16 maps with plenty of juice.
I am not talking about constant damage, but maybe 1-2 events per map in which a seemingly harmless enemy or random rare can suddenly hit you for 13k damage or more.

I have a very tough Amazon build, which can easily go afk during T15 maps. Sure, the enemies will chip damage me, I tried standing there, the enemies hit me for very expected amounts of damage. Everything fine there.

But once a map it seems, I get hit with a truck and barely survive. As if getting hit by a giant ape wielding a column. Except there is no giant ape, or anything I considered remotely dangerous before.

Our support has 14k energy shield and those hits are enough to insta-delete him.

Has anybody else seen this behavior in the game and can tell what to look out for here?

This seems like an outlier or bug more than anything else.