[1.4.3531 All DLCs] Cannot smelt stuffable armor

[skullywag]

Im seeing a possible issue in that, for example, plate armor is no longer smeltable, it seems to stem from it not having a fixed costlist and being stuffed. All other armors are smeltable but from my checking they all have a costlist. So anything with "costStuffCount" is no longer smeltable. Plate armor in this example has a base of "ArmorSmithableBase" which has the smeltable tag set to true. Is this a known change or a bug, possibly with the special filters?