The issue seems to be related to windows/fences, but since the update today I've lost several companions that get locked in a decision making freeze between jumping through a window or over a fence and running away/ fighting. They just freeze and get mauled to death, usually presenting their back to the horde.

Also, not sure if this always happened and I just never noticed but they've started shoving me to the floor in combat or sprinting into me when they panic and throwing me into the horde.