I am getting some items that will not add to a cauldron when cooking. So far I have seen it with Gunpowder, Redstone_dust, speckled_melon, poisonous_potato, bone and rotten_flesh. When you click on the cauldron with the item in hand it does not decrease in quantity held or give any indication the ingredient is added like other ingredients do.

Changed all the items from Material name to itemID# and they all started working.