yes im aware of all that.
Guild-mate summoned on his genetic earlier and was able to cart cannon and acid bomb. This is on Ymir. Did you have enough materials and made sure the cannon balls were equipped? they de-equip automatically if the character happens to die.
I have enough materials and I totally aware my balls are loaded.
(well the fact im soloing my gen itself means im all aware and experienced enough to all genetic quirks)