Guild Wars 2

So this happens to me a lot. I’m with people, assulting from the start. Get my fair share of kills, do my fair share of damage, kill the lord and stand in the circle til it’s ours – but I get no xp.
Anyone know why this happens?

It’s a bug I encounter more often when I’m with a large group. You know something has gone wrong if you get an xp tick from the lord and still get zero credit while in the circle.