I have a Nanniwa 12k for finishing and keeping the razors in condition. After honing the edges on the long side of the stone remain rather rough. Is this normal after honing ? I think it is because of the spine going over the stone , but not sure. Looks like the edges are a bit swollen .
I had this now already several times. Also after flattening the stone with another stone or sandpaper grid 400.

anybody familiar with this phemomenon.