Hi,

ive run the update 1.17.10 on my sons iOS device. Since I've done this all his builds on one of his worlds have disappeared. In their place are huge holes.

It's only happened on one world, it was his largest world. He has spent months on these builds and to have them wiped out after an update is not very good.

any ideas if these are lost forever or how to get them back?

I have attached a before and after picture below.