I slept in a Dunwarren bed thingo. Now I can rest in weird places (possibly everywhere) and after I rest, I always get regenerating.
http://imgur.com/a/tBoM4
Note: this has passed through rest, but not reset (yet)
I think this can happen sometimes if you log out while inside the Warders chambers, should be fixed if you walk into range of those beds, (rest?) and walk out.
(Assuming the OnExit trigger doesn't fire properly for the set area due to logging out while within it, or the bed uses some other way to check if you're in range that disassociates you from the object when you log out)