Game Mechanics: Invis Preventing Re-Aggro

[quido]

In the previous invis-pulling patch, changes were made that no longer allowed invisibility to prevent a mob from re-aggroing after standing up from a flop. It was said that the only thing that will continue to work like this is sneak. Recently I noticed that this change is no longer in effect.

https://www.youtube.com/watch?v=FOn7haxJxG8

Here you can see me with aggro on a single wurm. I flop it, it begins to path home, and I stand up and immediately click CoS. The wurm doesn't re-aggro. Then, when I click off my invisibility, the wurm immediately re-aggros.