Act 3 Infested Barrens Antlion Chargers rolling through walls

As the title says. Up against a wall, I had these mobs rolling over me and phasing through the wall. I kited one around for a bit, trees would stop it, but the wall wouldn't stop them. I don't get the vibe that it's an intended result.

I too experienced an Antlion rolling through a wall. It was on my side of the wall and ended up on the other side.

https://imgur.com/NJGiLOv