Love 2.0, thanks for all your hard work. There has been a persistent bug with the Sword Cold Blood.
I've only tested this on Barb but, when ever I Whirlwind, (or in the past Windform) after a few Whirlwinds my character is no longer able to move when the skill is active. He just stands there and makes the sounds. I think it may have something to do with a bug in the sword where you can actually use the Shatter The Flesh proc on the sword as an OSkill, after it procs either Blizzard or Shatter the Flesh. Being able to use Shatter the Flesh OSkill becomes available after you can no longer WW with the sword equipped.
If you remove the sword when the WW is bugged, you still stand still while Whirlwinding even with another sword equipped.
I can record a video of this bug if required.