[BH] Collectables from Trashley's boxes don't register as collected

Other than Trashley's Certified Art, collectibles obtained from opening Trashley's boxes don't seem to register as being collected. I just opened a Best Box and obtained a Sadnum, but when I check collections, no Sadnum is registered as part of the Metals collection. Open a couple more and got El Bandito's Treasure marble, and again it isn't registered in the Colorful Marbles collection. A few more and got a Romantium, but again, it isn't registered in the Metals collection. Also got a Tudor House Snow Globe from a Better Box and a Blueberry from a Box, and neither of them got registered in their respective collections. On the other hand, all 8 pieces of Trashley's Certified Art obtained from the purchased 25 Best Boxes or the 6 Better Boxes and 15 Boxes spawned from them got registered.

Addendum: I could trade any of the non-registered collectables obtained above for other treasures from Trashley, and those new collectables were registered.

Addendum 2: Trash Fruit is registered as collected, other gardening items are not.