I play on a survival world, with couple of my friends. The world was created in 1.17.

I noticed the issue about couple weeks in the world.
My build would be broken; have missing blocks here and there randomly

At first we thought its a prank by one of us (it wasn't). Even joked around saying its herobrine.
Also, it wasn't a rendering issue. The blocks outright vanished out of existence.

Then the issue became quite frequent and everyone playing on the world started facing it. Finally it became very annoying, as it would break farms and the only way to fix it is place the missing blocks again.