Does this have the built in processor, or offline?
When you say 'start to fade', do you mean your DMax goes down? How much?
Which 'end' of the film starts to lose dmax? I'm suspicious of a processor issue, like Developer circulation or replenishment problem. I don't know if your's has the inline processor, or offline, but if the film that comes out of the processor first looks pretty good, but the Dmax gets lower and lower as more and more of the film comes out, I'd look at the processor.
I'm not thinking of anything within the 3050 that would cause this with no other symptoms.