build/buy mode fence glitch

I believe I have a similar or the same bug, so I'm adding it here instead of creating a new post:

Lot: New Moon Shack in Moonwood Mill
Mods: Currently off, but I've used MCCC in the save file previously

It has happened twice in the same file and lot that a make certain changes in build mode, try to undo it and the game stops working. I'm unable to place anything and my sim is also unable to interact with anything. Time is stopped in live mode. Essentially I can interact with the HUD, but not the sim world. When I click to go to Manage World I can choose whether ot not to save and get to the loading screen, which then is never ending. I have to End Task in Task Manager to close the game. 

Both times it happened I was working on adding a second floor to the house and was making several large structural changes. The first time I was moving a balcony from one side of the house to the other and moving fences on it, then trying to undo something. I somehow ended up with the on hover preview of how a wall looks like when swapped with a fence to apply to and remain on all walls I hovered over until I changed to a different fence (or when I left build mode, not 100% sure).

The second time, working on the second floor yet again as I had not saved, I deleted a room, changed my mind and clicked the Undo button. The room itself returned without the door that got deleted with it and the Undo/Redo buttons became unresponsive. I yet again became unable to place or edit anything in the world. I could still pick up items, but could not place them anywhere aside from their original positions. Had to forcefully End Task to close the game when stuck on the loading screen again. 

Edit: It has happened a third time just after I posted this - I had almost finalised the second floor and wanted to change the stairs at the main entrance to a foundation with stairs at the front dorr. When placing them, I wanted to make it two tiles wide, but they were invisible when I tried to drag the stairs to widen them from one to two tiles. There were still green squares where the second tile of stairs were supposed to be, but no stairs. The rest of the game is now unresponsive like before, not letting me change anything in the world. This time I tried to Exit the game directly from the Menu instead of going to Manage Worlds first, and it's now stuck on the Menu screen with the cursor forever "buffering" (looking like a spinning circle). This time I didn't have to close it with Task Manager as I got a pop-up from Windows about the game not responding and could close it from there.