My worlds have been erasing alone

Hello, I wanted to report that the worlds are deleted 2 times in a row in version 1.16.3 I wanted to see what I can do to solve it, I also want to highlight that I give it to save and exit and they are still deletedHello, I wanted to report that the worlds are deleted 2 times in a row in version 1.16.3 I wanted to see what I can do to solve it, I also want to highlight that I give it to save and exit and they are still deleted