Guild Wars 2

Have done it 20 times+
No progress for the achievement.

Worked perfectly for me. Are you scoring points as a ghost?

I have cycled through the Achievement twice, already (I only do it once per day), so it is working just fine for me, as well. You won’t get an achievement point, though, if you don’t get the chest each time (which means you got points for something other than just surviving).

Are you scoring points at all? Are you in the top ten at least once?