As you can see on the image, about 20 minutes have passed since the start of the hour-long wait, yet to refill the kisses it is charging me full price, counting the timer as exactly 10 hours wait time in spite of it clearly being 9 hours and 40 minutes. There's a clear discrepancy between both timers that the game is not addressing.
I was hoping to refill my kisses quickly before my boosters expired, yet now it's charging me extra for that, making me lose the boosters! That's just not fair!