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8 themes selected
Duplicate charge on retry
16
Coupon silently dropped at payment

Shoppers apply a working promo code in the cart and watch it disappear once the payment step loads, with no message explaining why. The pattern clusters around stacked offers and expired-but-still-listed codes, and most people retry two or three times before abandoning the order or contacting support for a manual adjustment.

16
Address autocomplete drops unit numbers
6
Guest checkout loops back to sign-in
6
Saved card fails step-up verification
5
Cart empties after switching tabs
5
Shipping estimate never loads
5
Tax recalculates after payment
5
Wallet sheet closes on its own
5
Order confirmation never arrives
5