Couple of bugs I noted with the adventurer equip screen: 1) trying to enhance a Brigandine +1 to Brigandine +2 from the equip screen consumes materials, but does not give the upgrade. Unequipping and enhancing through the item works fine. 2) Returning to Adventurer Equip screen to re-equip armor shows the previous item level (Brigandine +1, not +2) and will not allow you to equip until you click the unequip (x) button on the armor slot, at which point the armor shows the correct stat (+2) and allows you to equip it.
Sorry if unnecessarily detailed. Figured too many details were better than too few...
 "Idle Adventurers Guild Master"){kind=icon}