My main world keeps crashing

One of my worlds keeps crashing. 

My game updated itself today to 1.18.30. Everything seemed ok for a while, but after about 1 hour of playing, my world suddenly crashed. It now crashes every time I try to enter it, a few seconds after loading. I am returned to my tablet's desktop with Minecraft running in the background ( main game screen). Other worlds seem to be running fine.

Simple solutions, such as restarting the tablet or trying to run the world with different settings failed.

I play on a Samsung Galaxy tablet. I can't access any of the world files to attach them, because they are stored in the internal storage and they are invisible for the user.