Should be fixed in 1.18 because they moved game files from games/mojang to android/data.
Maybe fixed with today's 1.18.0.21 beta, but I don't want to use beta, so I can't try.
I have only basic music pack
After reducing worlds from 126 to 1, it is better, but still slower than android 10 with 126 worlds.
OK. I will try it.
Fixed with 1.18