10.0.2 introduced a new reagent bag with the prepatch event (Storm-Battered Reagent Bag). It seems that Peddler doesn't recognize any items previously marked that get filtered into the bag, nor does it auto-sell them. No errors given, just doesn't work in that bag.

Hi old chap!

Thanks for the bug report - didn't even know a new bag slot was added till now (I only really play Classic nowadays).

Peddler 7.5 will support the new bag.