Try this:

Develop as normal.
Rinse 30" or use a 30" stop of 1% acetic acid
Fix in the C41 fixer
Wash as recommended for post fixation
Stabilize or Final Rinse

Now, examine the negatives in the light. If the mask is orange like your "good" negatives, then the bleach is at fault. If not, then the developer is at fault. And, BTW, if it is the bleach, the negatives are not spoiled, just prewet, bleach and then fix as normal. But, remember my warnings that some blixes are not film friendly or effective enough.

PE