It's a currently known installment. Enemies run to the nearest group for support and eventually head back to their spawn. Just follow them, it's no big deal.
It's by Design.
Mobs run a lot now. You can try to control them (I guess you can invite a Dominator!) or just watch where your pets are going.
Mobs run even worse with anchors on them so make sure where your Darkest Night anchors are.
What's left is to normalize all Assassin Strikes and improve Stalker's old sets (Claw, MA and EM)! You don't need to bring back the missing PbAoE attack. You just need to make the existing ones better! For example, make Slice a WIDER and LONGER cone.
I have been gone for a while, but have come back and playing my Thugs/Dark MM.
I don't remember this from before, but I have been having serious issues with runners. I don't mean they get near death and take off for survival; I mean minions and LTs alike running at the start of the fight and not coming back.
Anyone else having this issue?