IAPs Not working second time

After you call the checkout flow and successfully make the purchase, you dispense currency in your game. Ideally, what you should do after that is to call Platform.IAP.ConsumePurchase() to notify the API that you have successfully dispensed the currency. Kinda like this:

Platform.IAP.ConsumePurchase([your_SKU_here]).OnComplete([newVariable] => 
{
    if ([newVariable].IsError) {
        // Insert whatever bit of code to execute here if ConsumePurchase fails.
    }
    else {
        // Insert whatever bit of code to execute here if ConsumePurchase is successful.
        // You can use [newVariable].Data to access any other data that was fetched
        // when ConsumePurchase was executed.
    }
});

AFAIK, this only works for consumables. It should make the purchase popup prompt show up again.