Acients fight gave no XP

Has anyone encountered this:

Difficulty: Normal
Class: Paladin
Level: 31
Online character
RoTW
Non-ladder

I got to the Summit at level 30, but very close to 31. It was definately 30, becasue I unlocked Fanatacism not long before. So I decided to TP to town and go to the 1st waypoint in Act 5 go get the remaining exp to get to level 31 before the fight. Got it, went back to town. TP back to the Summit. Defeated the Acients and... nothing. The last "Spirit" took a bit longer, but they all end up as statues again. No dialogue and no EXP. Same freshly hit level 31. White bar is not even visible. The gate opened, quest marked as complete. Exited the game and got back in. Quest still compleated, but no EXP. Is this a bug?@

Deckard Cain