When farming and I come across some really mob dense areas, my spirit walk refresesh almost instantly. When I re-activate spirit walk when I'm still in the middle of my first spirit walk, the buff just goes on cooldown and the old activation still counts for the duration.

I kind of suck at explaining it so I made a video demonstrating the bug.

http://www.youtube.com/watch?v=GD1HB_0_vHo