[GAMEPLAY] Gangplank is unable to upgrade Ult.

When you have gained 500 Silver serpents there is a chance that you will not be able to upgrade your Ult as the buy button is grayed out signifying that it is unavailable for purchase. The only workaround to this problem i have found is simply reconnecting to the game, but that is a hassle when you have to reconnect for all 3 upgrades throughout very crucial times within the game.