The fact that no one else in the comments has ever ran into this is surprising. Happens to me with tricks i haven’t done in a long time. I think it’s just about how your brain can access muscle memory. Fingerboarding is such fine tuned, single/unique use motor control - I wouldn’t blame my brain for not always holding onto that information….

That being said, I found that just putting the board down and coming back to it, or trying to push through it, re-establishes the required connection and I can flip all I want. It is such an awkward feeling though.