Hey there!
So basically,
My builder was working in a team create place earlier today, and he closed it when he was done. He opened it back up later and lots of his progress had been deleted!
He said that it wasn’t as if it had been reverted because some things were still there but he lost lots of parts and a few unions!
I am the only person (other than him) that has access to it, so it hasn’t been deleted by any other members, either!
We both checked autosaves/recentsaves and the only copy we seem to have is the “Broken” version. It seems that when we rejoined, it automatically autosaved this broken version 
Is there anything I can do about this?
Thanks.