Adamant Anomaly, no XP??

ScytheNL

I was visiting Craglorn for the first time last night and came across a huge message saying 'NOW ENTERING A GROUP AREA!'. There were people waiting there so I decided to wait with them. Suddenly all kinds of enemies started spawning, just like at a Dolmen. Except, I noticed I wasn't gettign any XP for killing them? Is that normal? Do you only get a reward for finishing the fight? Or was it because I wasn't grouped with the others?