What's up with the enemies going AFK (not moving) in this expansion?

Has anyone else noticed?

Like trying to get casters to move in dungeons, if you interrupt them and even if they have spells only from that school they sometimes just… stand there?? For sometimes legit as long 3-4 seconds until they can start casting again?

Or a world rare does some fart-cloud under them and I’m just waiting for them to move out of it and they don’t do anything for the first few seconds?