Hey, so I came across this bug the other day. If you're in revenge mode you should have infinite stamina but if you step on a trap feat, like the viking bear trap, it'll leave you exhausted even though you're supposed to have infinite stamina.
Nah, I don't think it's intended. You get pinned and your stamina gets set to 0. If, when you had revenge, it only pinned you for a bit then that would be fine.