Originally posted by Geno(AKA) EL BOB GATO:

Alright, I've been playing this for a while and never had this happen. I'm pretty sure I password protected my server and never saw anyone else. I was expanding my base, not vertical not onto the old structure but over a bridge I had made. Using nothing but stone, I go to get more stone from my mostly wood base with a few stone supports to find parts of the stone destroyed several chests destroyed. Work benches and forges destroyed. Almost like someone ran around with a hammer popping them.

There were no monsters inside the base, it's surrounded by a deep moat filled with spikes, then has a stone wall around it with multiple gates. Plus if it were a monster why would it be gone? I'm so close I'm in visual range of the place where things were destroyed.

So I'm wondering, is there an item limit or something and I exceeded the limitation without realizing it? I haven't even explored the full map, a lot of it but not the entire world.

Lack of structural support, maybe?
If you place an item there, will it be glowing red? Removing supports from under objects might've triggered stability recalculation, thus destroying your objects.