Why do the relic shield items start with one charge when you buy them?

This might not be an issue if you buy the item right away when you load in as you'll gain the the charges soon but if you buy the item later you'll start at one charge and it'll be 45 seconds before another charge loads up.

I feel like maybe it should start with 2 charges on purchase? It feels bad when you for whatever reason either load into the game a little later and buy the item but you start with 1 charge.