WoW Retail, Rogue Damage Ability Does Not Unstealth (Patreon)

The level 100 ability "Blade Rush" is currently bugged. When you use it to attack a low-level mob or player it does not bring you out of stealth. This allows you to attack low-level targets near high-level players/npc's with impunity.

I thought at first there was some kind of synergy between the death of the target and stealth, but on several occasions I attacked a low-level player without killing them and still remained in stealth, so it seems to be just some function of attacking a low-level player. 

If you are in an area where guards spawn then unless you are in close proximity to a guard, guards will not attack you, and you will not be brought out of stealth.  

You can of course, still be brought out of stealth by moving too close to a high-level player/npc.