In a specific creative world the game crashes, just shuts the app down and returns to Home Screen. It always happens when clicking “Save and quit” and sometimes when entering a nether portal. The only work around I managed to use is setting new spawn point by using a bed to set new spawn point (just to use commands and set new world spawn doesn’t work). That work around only works as long as I always set new spawn before entering the nether portal, and only work like 75% of the times used. It does not however fix the bug where the game crashes when clicking save and quit.

It’s a creative flat world with seed 973787453. Experimental is turned off.

How to replicate:

1. Enter world
2. Enter nether portal 

1. Enter world
2. Set new spawn point by using bed
3. Go into and out of nether portal (back to overworld)
4. Press Save & quit