Guild Wars 2

I was doing the Temple of Grenth event over the weekend and I came across a possible bug.

Description:

After acquiring the ‘realm of grenth’ buff in order to damage the Shades I started fighting about 4-5 shades at a time while trying to kite them out of Jonez and also stay away from the fall damage. I was hitting the shades happy that everything goes according to plan. I did not took any kind of damage since my HP bar was full and not many damage entries in the logs.

I got suddenly downed in the middle of the shades and it was definitely not falling damage, no red circles, nothing. I am checking my Combat log. No damage whatsoever.

Could ArenaNet care to explain what kind of damage instant downed me, without falling through the roof and without any damage in the combat log ? Or is this part of the shady ways Grenth is fighting from the other part of the room and obviously outside his range. Shall we get prepared for another kind of ‘mystery bug’ damage ?

The shades apply a debuff to everyone near them. Each stack of the debuff increases the damage you take. At around 25 stacks, you get instantly downed.

Is this described in the tooltip of the buff ? If not, it should!