Cannot delete or modify custom furniture

[Woodi]

• Game Version:

• Platform: Steam Windows

• Mods: (Choose one: never used / removed / active)
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• Steps to Reproduce:

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• Details:
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After placing custom furniture, it cannot be deleted or modified.

Clicking does not even select it.

There is also a bug where the ceiling is pierced above the stairs.

[LennyOgg]

Regarding the non-deletable furniture, there is maybe a way to delete it when you draw a wall through them.
User @Yoshimou suggested this → here and it also worked → here