Rerolling in URF with 3 Rerolls left uses 2 instead of 1

When rerolling in URF after getting your random champ, if you have 3 rerolls left it uses 2 of them on 1 reroll and leaves you one left. I know this isn't a huge problem since its URF but it feels shitty since you already get random champs you may not want to play and saving rerolls is necessary for enjoyment.