[Neus]

While this is sort of a bug, it's mainly due to the way item potential unlocking is tracked. Crafted and dropped tomes are 'technically' different items according to the game, which is why this happens.

Should it be that way? Probably not. But fixing it would require some retooling of how the item potentials are tracked, so for now, it'll have to be the way it is. I'll try and think of ways to fix it without wiping existing item potential unlocks.