I have gone through great pains verifying no fog on the first step, developing unexposed film.

During the light flash step, I have visably verified the leaders (35mm) are indeed clear.

However after the 2nd dev step (and fix) the film comes out with fog on the leaders.

The developer I use is Dektol, the bleach is Potassium dichromate, the clear is sodium metabisulfite.

Is the bleach or clear step not long enough? I understand that I may not see some of the emulsion left on the leader after the flash step, but am I just missing something?