Rarely, enemy physics will bug out and teleport the enemy into the sky after being hit once. I hit a cave bear, and it warped up into the ceiling. It wouldn't come down until I killed it by hitting the spot where it was previously standing at.
Dragon hit box/collision box seems a bit too large and glitchy currently. The hit box is not properly transitioning all the time with the actual model. For example, I started doing a dual wield combo on a dragon while it was lifting off, and my combo managed to still hit it, even though it was way up in the sky. Sometimes, you can be physically hitting the model also, and be hitting air instead.
Sometimes during Alduin's bane, Alduin will freeze up in the sky and be unkillable. Sometimes, he will also spin in mid-air and then begin walking on the sky.
All dragon Ai gets stuck looping melee attacks sometimes. They will spam melee for no particular reason, like the Ai is getting stuck/glitched instead of trying to turn around and face the player/attacker.
There's some strange glitch that can cause massive framerate drops and crashes indoors. It seems to happen very rarely or randomly, and it usually clears up after turning off the system and reloading. May be related to multiple physics objects bouncing around and not stopping.