Whenever I rate or review an app on from the App Store on iOS, it never saves the rating or review. It only appears to save the rating/review initially, then if I view another app in the store and go back to the previous one, the review isn't saved. If I close the App Store and reopen it, the rating/review disappears.
I can tell that I'm definitely logged in to the App Store as I can see all of my purchases and register new apps to my account.
How do I get the rating/review system to work properly?