In the last week we have experienced crates that we have stashed around buried underground finding their ways dug back up. They were not dug back up by players as the loot remained untouched.
In addition to this, we have dug crates up intentionally with intent on moving them only to find when coming back to their location that they have disappeared. This resulted after we dug them up, brought a nearby crate to its destination and came back to pick up the other crate, only to find it has disappeared. No players in the vicinity and crates were well hidden.