The update didn't arrive yet to Minecraft pe, my last version is still 1.17.40.06.
Yeah, I don't know why the space of the that one specific world with his backups is getting larger or bigger and bigger and after this it crashes. And after it crashes the space of the world is getting back to normal,but it still crashes.(like the space was 30 mb, than it goes to 100 mb and after it crashes it goes again to 30 mb). This is what I noticed. And I'm not on experimental.
The update arrived and it fixed the issue. Thank you.