When testing our IAP subscription in a new locale, our QA team noticed that the amount displayed in our app (which came from a SKProduct, from Apple's IAP servers) differed significantly from what was shown in Apple's sandbox subscription confirmation modal. The amount in our app was correct, but the modal showed the wrong amount.
I haven't seen this before, and can't come up with much of an explanation for why this happened. Is this a bug in Sandbox subscription testing for IAP?