Issue resolved. I first ruled out that it wasn’t my character by first removing the anim class - no change, then the skeletal mesh - no change, then creating another character from scratch - no change. After those tests I knew it was something in my map. Then I started looking through my map one by one and very quickly realized that I had a Blocking Volume laid out over my landscape. Deleting the Blocking Volume fixed the issue and all collision capsules returned to normal.