Yeah this can still happen especially on high havocs, despite new/redesigned spawnpoints…..and then a trapper/dog/mutie just catches your trough them because physics are not part of the 40k universe either.
I was playing the mission on Chasm Station Logistratum a few weeks back. I was right at the end. Damnation. No modifiers. At one point so many enemies fell from above so quickly it looked like a snake was coming through, one solid body.
Repair matrix has an enemy dropdown along the wall next to the stairs on the res just before the mid event where enemies visibly pass through a wall. It’s often a spot I either rush through or immediately turn around drop back. It’s not the only one that exists but it’s the first that comes to mind.
If you’re talking about the enemy pathing being worse that’s most likely just the servers. The update definitely made enemies feel worse in how they walk straight through you or perform attacks as they go inside you, but I doubt it’s a deliberate pathing change or something