The game doesn't crash in the editor. I have tried a few, including Elmcreek Multifarm and Elmcreek light, and a self made mod of elmcreek. In all three cases, game only crashes when placing a building over the vanilla building location at the map boundary. Though I have not tried placing a building...

We removed the buildings via the editor, but the game crashes when placing a building where a vanilla building was at the map edge near field 64/65/66/67