Yes, I've had a weird thing a couple of times where it's like I can't remember which foot is which. It happened once in the car when I was reversing out of a space and I just froze for a second trying to think which foot I shood be using. It completely freaked me out. Also occasionally my foot hasn't come down the way i meant - in a rush, clumsily. I've also had problems with my hands sometimes when playing the piano - I've been playing for years, but every now and then I just suddenly find myself stuck in a way I never have been before, like my hands are confused, or my brain has short-circuited.
I hate this side of the disease. Like it hasn't taken enough from us already....
You're not alone with this, I think it's more common than we perhaps like to admit.
Bram.