Why do you mark my bug report as duplicate even though it isnt?

Can I ask anyone from the staff why do you instantly mark my bug report (https://www.warmane.com/bugtracker/report/84056 ) as duplicate so it cannot get any upvotes nor commentes. Even though it isnt a duplicate? I searched all the class related bug reports in last 1 year and it isnt there. And the spell was working properly about 2-3 months ago. If it is indeed a duplicate could you please link the original report that i duplicated? Thanks for answer