I've found a couple of issues with the Thaumaturge's Backpack:
First, the tier 1 (non-woven) backpack can't be crafted and can only be acquired through commands.
Second, the backpack will collect literally everything. Is there any way at all to configure what it can and can't pick up? There's no mention of it in the magicbees.cfg.
Minecraft 1.12.2
Forge 14.23.5.2855
Magic Bees 3.2.25 beta
Thaumcraft 6.1.26 beta