Castle Wall Foundations are currently use at your own risk. There is a known, (but not easily replicatible), bug that effects this structure where demolishing on wall might demolish every wall in the chain. A game bug had rendered the Wall Foundation unusable in certain situations where the game would think there wasn't a nearby foundation. The only fix I could come up with was to remove the foundation checks for walls. In those situations where the game code fails to find a foundation even when one is present, demolishing one wall in that chain could cause all of them to become destroyed. As there isn't a way to determine which situation you find yourself in, this item is not recommended for use. I will leave them turned on to keep all the ones that are not having issues from disappearing but I wanted to get word out to you guys.

known bug, top of the main description