19+ GB of RAM in worlds

After switching to 1.17.32 version, my super flat world started to take up to 20 GB of RAM, it also started to run for too long.

 

I set the chunks to 16 (instead of 80), but it didn't help, the game still requires up to 20GB of RAM (there are 24 on my device)

 

Previously, this world didn't work because of error MCPE-140428