When leaving a world, the world files automatically get corrupted

So I was just playing Minecraft when I just exited a world, and I didn't see it anywhere! It was gone (corrupted)! Is there like a limit now to how many world you can make?

REPRODUCE

• Create a world in 1.17.1

• Mess with the world

• Exit the world

OBSERVED RESULT

• The world files are automatically corrupted

EXPECTED RESULT

• The world files are saved

UPDATE: it was a launcher problem