Note: The world is a beta world.

Steps to Reproduce:
1. Open the world I sent you in google drive link.
2. Open the world play for may be 30 minutes.
3. Close the world and you will be stuck on saving world screen.

Observed Results:
1. Stuck on saving screen. At one point world was stuck on generating world screen.
2. It is observed that when you play for less time like 5 minutes or less the world saves successfully.
3. I had to be afk whole night while sleeping to save the world which saved successfully.
4. I transferred the world in my android phone it showed same behavior.

Expected Results:
1. Waiting time should only be like 5 seconds max. But it is taking too much time.

Download link of my world : +110 MB
https://drive.google.com/file/d/14JpCvuWREEI3U6y2aHrl3SCutbYJPcBt/view?usp=sharing