Bug or event log error?

I logged in today to find 2 pieces of my roof missing and my thralls from my wheel of pain gone. But nothing in my event log about anyone breaking in. The Gruel was still in it but all the thralls that had been breaking overnight were gone. All other building pieces are untouched not a single point of damage taken on any surrounding pieces, just the two ceiling pieces for a person to enter. Its been a good 3 hours and logged in and out and the event log still says nothing, bit confused.

Edit. This is on official 1970 oceanic PvP.