Have you tried memorizing the passages where tongue and fingers fall out of sync? (Not memorizing to perform or even practice from memory, but just until you get the notes under your fingers.) When I’m totally glued to the just the measure I’m trying to play, it doesn’t go well for me. I find I often need to be looking ahead by several measures when a piece of music is very fast or very difficult. Letting go and looking ahead can be hard to do when the notes aren’t already under my fingers. Don’t know if this is remotely applicable to what’s going on with you, so please disregard this if I’m totally off track.