You may see that a redeemed Spently discount code with no order information in your Shopify backend. Some orders can take up to 48 hours to populate. However there a few reasons which are an exception to this rule;
1: The customer could be using a private browser which prevents tracking or an app which stops cookies being tracked.
2: The customer has cleared their cache and cookies,. This is is the data used for tracking which has been erased.
3: The customer has switched to another device to complete the purchase.