As can be seen in the screenshot taken while using the Chunk Debugger, there is a pre-made building zone still being recognized here (x,y,z = 3727, 10892, 0) despite me using a sledge to destroy every single tile related to it. It's existence is screwing with my player-built structures, specifically making it so that I have to stand directly on the tile of the sink you can see to my character's east-southeast to actually drink, fill, or otherwise use it. It also displays the cutaways and roof tiles incorrectly depending on angle.
I know the IsoRegion debug option can be used to monitor and modify most existing buildings to ensure interiors are actually considered interiors, but I can't find a way to fix the issue I'm having here. Am I out of luck?