Fiddlesticks bug?

Cant use my mastery while in the new "scarecrow" stasis of fiddles. It just bothers me and is a small thing i want fixed cause in pre game before minions spawn i like freezing and i go to use my mastery and it wont let me :CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCc