Forge Oddities

Has anyone else experienced the shifting of walls and floors when you come back to a forge map or a friend joins in?

I spent a whole hour just going through and readjusting every block just to be able to walk across the floor. All I wanted to do is place a weapon I forgot to earlier that day (keep in mind it was a few weeks ago).

Also, when I join a friend’s game, the floors are all messed up again.

If you have any suggestions to prevent or repair this without having to scrap the whole thing and start again it would be appreciated.