Attempting to trade with villagers, with a Princess for emeralds, Princess+Emeralds for a Monastic Drone or with a Drone+Ender Pearls will not automatically place the bee componant into the trade window but will populate with the additional componants (ender eyes, emeralds etc)

This seems to be a problem with the way Vanilla handles items with NBT. Not much I can easily do on my end.