Factorio Forums

Steps To Reproduce

1. I have a blueprint with the new fancy (refined) concrete tiles
2. I'm not making any
3. I manually place unrefined concrete instead
4. I'm still getting warnings about the unrefined concrete being missing, even though I've overlaid it with different concrete
5. But if I was to start making it, it wouldn't get placed would it, because there's other concrete in the way now

That's not the same behaviour if I were to (for example) manually put down yellow inserters instead of blue ones after I placed a blueprint, so I think it's a bug.

DRY411S wrote:But if I was to start making it, it wouldn't get placed would it, because there's other concrete in the way now

It does, actually, it acts just like it would if the blueprint was placed after the tile was covered.
Anyway, it should remove the tile ghosts, and it will in 0.17.
Thanks for the report!