Hi, sorry to bother but I couldn't send a private message (says "access denied"...) but I thought since I'm encountering this bug too, I should send you the link to my save file and a short video showing what the problem is, still. (On my Google Drive)
I was just trying to build something on the 50x50 snowy lot in Mt Komorebi after having bulldozed another lot I had downloaded from the gallery, and suddenly I couldn't place any objects (they would just disappear), I couldn't suppress any room (when trying to delete some, the room would just "unselect" itself), and I couldn't sell any item too. I tried other tools like the hammer for walls, and a few would be deleted, but some stayed and then when trying to delete it again, a message would pop up telling me that there's nothing to delete....anymore.
I tried going into manage world without saving and going in again, it didn't work.
I have no mods or cc installed. Game is up to date and I have all packs except for Journey to Batuu and the last two kits that were released recently ("artist studio" and "storybook nursery") and I am on PC.
If there was another way to send this to you I'm sorry, I didn't know how.
(English is not my first language so very sorry for any grammar errors or if any of my sentences don't make sense I'll try to explain more)