I built a base around the oak tree, so I spend a lot of time harvesting grass and stems at the base of the tree. I'm having problems with enemies spawning inside the roots of the tree. I've noticed this in particular in roots near the trash can and on the north side of the tree. Also, I was next to the tree when "Somebody" attacked, and the spawn point for the enemies appeared to be inside the trunk of the tree, where they join with the roots. When enemies are inside the tree, they can still damage me and my buggy, but my weapons bounce off the tree instead of damaging enemies.