I have old world since 0.9.0. When I updated to 1.17.40 my world started corrupting. Every time I restore my world from latests backup it gets corrupted in hour or day. I don't why it's happening. I thought it's due to my device's problems, but its not. I bought realm and loaded my world on it. And it still keep happening. JUST WITHOUT ANY REASON.
When I played on 1.17.11 everything was fine, this issue started happening after updating to 1.17.40.

I think that problem in this: on 1.17.11 corrupted chunks are being replaced by new, like they was firstly generated, but in 1.17.41 corrupted chunks aren't being replaced, leaving ugly holes.

Also this happens when I'm going so far and returning back later. While I staying on spawn chunks everything is fine
I can't load my world here, because it's so large, so you can't check it by yourself

On first screenshot you can see desert temple "remnants". I think this remnants was created by replacing corrupted chunks with new . This screenshot was made on 1.17.11 and "remnants" located on area, that was generated on 0.9.0 alpha, but some chunks of this area were corrupted and replaced by new chunks, that was containing desert temple. If I'll go to this area on 1.17.41 I won't see desert temple "remnants", just only ugly holes. I presume 1.17.41 contains bug, that doesn't let minecraft replace corrupted chunks with new

I'M BEGGING YOU, MOJANG. DO SOMETHING WITH THIS. My world means a lot for me. It's my history. Please, don't let my world fall into nothingness