I exclusively use this paper and dry mount all of my images.
I have never come across this problem.
Do you use a mount board over the surface of the print when in the press?
The only thing that I have heard of vaguely similar was a friend who used old selenium in a tray with raised grooves and very little toner and only rocked the dish in the direction of the grooves. This led to a faint banding on the paper with the ares that received sufficient toning having the characteristic selenium colour and the areas that received insufficient toning retaining the paper's slight green cast.
What I can confirm is that this paper requires:
1. A hard working developer with at least 3 minutes development.
2. Frequent changes for the water stop.
3. Two bath fixing with more frequent than normal discarding of bath A and always fresh bath B.
Can you post images?
Best,
David
www.dsallen.de