This propeller i modeled has wrong shading on the tip of the blades, like if there are sharp edges but there aren't. The vertices are all connected, the normals are calculated correctly like u can see in the screenshot. I tried splitting it on the wrong shading line and rejoining them, but even after cleaning by distance the problem is still there. The model is using the auto smooth at 180° so that's not the problem either. Also if it can help, when i try to unwrap it, i get separate islands like if those sharp edges had seams aswell even if they don't. What could it be?