Weird performance

My device is Xiaomi Redmi Go, with Android Go 8.1

1. It took about 3 minutes to enter a world
2. I noticed sound and visual delay while destroying blocks, maybe about 0,4 seconds
3. It feels laggy, everytime I start a new world I'd never experience any lag before 1.16.100
4. World chunk load seems much better before 1.16.100