"You are currently sneaking. Taking damage will break you out of this stance. While sneaking, you have a penalty to the Jump and Tumble skills."
The penalty to Jump and Tumble seem to be working as described, but still the stance breaks when you avoid damage. This includes missed, dodged, deflected, incorporeal, concealment and any other forms of avoidance. Being damaged by spells is also broken as it doesn't alway break sneak.
Shouldn't it say Taking damage and Avoiding damage will break you out of this stance? Or just fix Sneak to what it is intended as when you take damage and interacting with most objects that invisibility also breaks.