Guild Wars 2

I have a question regarding the t1 mastery dusk collection,
When I completed Ulgoth I did get the t1 mastery reward, but the reward didn’t show up in my collection. This surely is a bug, but: a) are more people having this problem and b) when this bug is fixed will this reward show up in my collection or do i have to do it again?

I have just had the same problem this am. About to try it again to see if I get it this time!

Just tried it again, and obviously it wouldn’t give me a chest at all let alone the reward! Will have to try again tomorrow!

Actually, I just defeated Ulgoth, but instead of getting Modnir’s Ruin, I got Overlord’s Defeat, the one you get in Kessex Hills.

Definitely a bug.