We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
If you have instant building turned on then that's a know issue and there's not much you can do about it. It's been like this for years, gotta be fixed.
The best way to remove it is by creating a big storage room wait for it to appear there and bulldoze it with everything inside.