Apple pay "Payment not completed" yet amount captured

Our apple pay integration with the gateway "Checkout.com" is succeeding from Checkout side & the amount is captured (withdrawn from bank account) and confirmed yet on the apple pay popup it fails with a "Payment not completed" error message. Any idea how to resolve this? This is on multiple devices (iPhones, MacBooks) -The request in the headers is a success (200)

Apple pay "Payment not completed" yet amount captured
 
 
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