From my own personal endeavours, the owner controller won’t work here.
The only way that could possible work at the moment, until they allow us to get a reference to the pawn/player/controller that placed a structure, would be to get the three owner variables(you’re using one of them) from the destroyed and pass them through to the new actor upon creation/spawn and set them.
But, be warned these owner variables will be completely unique for each actor and tribe governance will determine the values if in a tribe.
-WM