At the moment on Xbox EU there is an issue with not getting your AP after successfully capturing a keep, outpost or town.
A lot of the people I play with are experiencing the same problem where once a keep, outpost or town flips & changes colour you get hit with a loadscreen and don't receive any AP for capturing the objective.
I know it's easy enough to earn a lot of AP but this is happening A LOT now. The other night I spent 2 hours pushing out from our home keeps to another factions and received AP for 2 of the 8 keeps. I was attacking each keep with ballistias during the siege & repairing after & still didn't receive the AP from the capture.