I was running around the military base and ducked into a tent to fend off some zombies, but I ended up dying because I couldn't block their attacks properly. A specific angle caused by the placement of objects and the shape of the tent makes it impossible to block hits effectively. When switching to a firearm, the character starts doing calisthenics instead of aiming.

Shown in the video. Happens in land_mil_tent_big1_4.