While endless kiting a mob of invulnerable minions I was slowly whittling the big minion down and then he all of a sudden just stopped while his minions kept following me so I did a loop back around to see that his health had reset... Really annoying considering the mob itself with invulnerable minions was already a giant pain in the !@# and NOT FUN.

Another would be when my enchantress charmed and enemy and while it was charmed (little thing above its head) he kept attacking me and killed me. Also really annoying because it seems that it's completely broken.