Not sure if anybody else has had this problem but during farming for bounties, i did the kill diablo bounty, at least 3/4 times with the same result
After the cut scene skips to fight with the diablo clone, the loading screen will stay up for well over 15 seconds but the actual boss fight starts so when you load into the fight you either instantly get jailed and loose lots of health or just die. ( i play only HC so it wasnt a nice experience) EU server
Please look into this before season 4 Blizz
P.S. Hope it wasnt just my computer but i did test atleast 3 times
Lost my Hardcore Barbarian to this issue, mostly in Act 2 and 5 i will do a few bounties and for some reason when teleporting to another bounty the little loading diamonds start from left to right then stop halfway or so, I will hear the game but with no picture. I close the game and then load it back up and my Barbarian is sleeping with the fishes.