Hi folks! There was indeed a temporary display issue where Diamond balances were showing as 0 in game. However, your Diamonds were safe and sound, and the issue was swiftly resolved. You should therefore now be able to see them again, though you may need to refresh your game to do so. Our apologies for any inconvenience involved.
If after refreshing your game you do not see your correct Diamond balance, or you have any other concerns, please do contact our support team in game, who will be happy to advise you