Issue with normals

Hi folks!
I’m having an issue with one part of my geometry and I’m hoping you could help me out. The mesh in question is that of the ignition ring of my engine. The image on the top right shows the same object with face orientation turned on.

As you can see, the normals seem to be oriented correctly, however the mesh looks inverted in one segment of the ring. To demonstrate this further, here’s what happens when I flip the normals of the segment in question:

While the model looks correct, clearly the normals are flipped as shown in the little image on the top right. FYI: the model was textured using Surface Painter.

I really don’t know what to do with this and I hope someone here has an idea how such an artifact could happen.