LF Draenei racial will ‘miss’ on every enemy it is cast on after having a race swapping to Tauren in Battle of Dazar’alor and then back LF Draenei after you exit the instance.
The ability seems to return to functionality after a character log out. If you do not it will fail on all enemies showing up only as a “miss” in the combat log.
This bug can be produced reliably after every race zone in race shift.