For me, the above reasons don’t apply at all. I’m level 24 in Huntsman, only off of making many of the basic items. I’ve never used the discovery pane before, and it’s only listing my bronze bars and glittering dust (and shimmering dust, but that’s in red). It does NOT show my vials of weak blood, or venom sacs, or any other crafting items which are at my level. At best, I’m putting this as a poorly explained mechanic, worst (and I’m hoping) a bug. I can’t discover ANYTHING at the moment, because almost no items appear in the tab.