Slicing winds interactions when Crowd controlled are completely broken at the moment.
When charging slicing winds if you are hit with any type of loss of control effect the ability goes on cooldown for the full duration without activating.
A large portion of the time when this occurs, the ability becomes completely unusable after the cooldown is finished and only a full game restart fixes the issue.
I have had solo shuffle lobbies where I got CC’d on slicing winds during round 1 and was unable to use the ability for the entire duration of the shuffle lobby.