This has happend to me with video games.
Been really trying to get good at fortnite in februrary/march and I actually got quite good but hit some kind of a mindblock... Then due to busy life I couldn't play for a month. Got sick 3 days ago and been staying home and playing it and I am noticably better than I was a month ago. So maybe alternating in playing for a 14 days and then taking a break for few days could do some real good