mine also the same, I also had the speedy B25 in DE and that is the only bag that has the hardware tarnished a lot though I take care of my bags
Same with me. So when they told me maybe because of how i store my bag, i told them that i store my bags in one place. AC on wholeday, regulated with even silica gels in each bags and store in their dust bags. Im so glad i insisted otherwise i didnt want to use the bag anymore. And it was free of charge.
Do you still have the bag or sold it?