There is a mod bug in V018
Incompatibility between the scratched surfaces (Red - Black and maybe others ...) of DECTORIO and your mod
Thanks in advance to see what you can fix

can you describe what the problem is?
It sounds like it might be a layer issue I can take a look at it

Instead of the red striped surface the cursor erases the surface and replaces it with virgin earth, ditto for the black striped
You are probably right because I deactivated your mod and if I find the red and black striped surfaces I do not have the green stripe which makes the same virgin earth effect with DECTORIO only.
Sorry I only write French (google translate)

For Info: The mod blamed for the bug was Alien_Bone V5 Since then I found all the surfaces of your mod and Dectorio is not defective

Can you show me an picture/video of what is happening? When I tried replacing the red striped tiles with extra floors variants and they were behaving normally

This is my testing setup:
https://i.imgur.com/7Z9JaNR.png