I face a weird behavior which I cannot understand, therefore any help would be appreciated. For one of my objects, the "texture coordinates/UV" value is all black which seems to indicate that it doesn't work. For the other ones everything is fine.
I've tried to unwrap again, either classic unwrap or smart or cube, without success. I've also tried to recompute normals or flip them but it doesn't change anything.
What can possibly go wrong here?