Yeah I'll have sorta slumps like after a long break or whatever, but yeah I get you like some times I will randomly lose certain tricks but I always find after a sump or a dip you get a sort of high a (few weeks) after where you'll land a bunch of new stuff
I had a slump for about a year, then progressed faster than I ever have over the course of a month in California.
Keep at it, there's always room to improve.