Normally, when you gain a stack of 1505441, granted by using 1490691, you are able to consume all of the stacks that you currently have by using 1490571 on an enemy to activate a buff that's granted to all raidmembers. This mechanic is explained in the passive skill 1490574 aswell.
Now, today I ran Orkham 2 times and in each run I tried multiple times to use this mechanic on Ruddrass, Buddrass and Muddrass. When I used 1490571 on them though, instead of granting the buff, the skill 1490571 went on cooldown as it should while simply keeping my stacks of 1505441 without a change. Since I couldn't find any effect in their buffbar, that would explain this outcome, I assume this might be a bug. A screenshot is added for visualization.
Thank you.
