Guild Wars 2

I have just finished this jumping puzzle, killed the veteran and got the loot. However, the puzzle does not listed as completed on the achivement list. I have too sent a bug report to you about this showing me standing there next to the open chest and too one of my achievement list, showing it as not completed.

Could you please look into this?

Cheers

Additional information on the puzzle:

Race: 80 Asura Thief
Server: Far Shiverpeaks EU
Group or solo: Solo
Traits used: Radiation Field and Thief’s Guild
Weapons used: P/P

There is another room after the Veteran Skelk, opened with the pressure switch. My problem is that the pressure switch isn’t activating so i can’t reach the 2nd chest.