My little high-end tier base also got wiped on an official server some months ago. Abused by a reporting player. I even screenshot that player who all the time afk’d on my 25x25 base. I wasnt even offline for more than 4 days, and all gone… hundreds of thousands of Alchemical Bases as well as ultra rare Thralls…
A friendly near-by neighbor’s base also had been wiped.
As many months have passed already, I might return with official 3.0 release again.