Duplicate transaction because the first one is not completely finished

[novoselt]

Describe the bug

• Stripe shows Payment1 and a minute later Payment2. Minutes of the time stamps: 28 and 29.
• CoCalc shows Payment2 and a second later Payment1, i.e. the order is reversed. Minutes of the time stamps: 30.
• User reports "When I purchased the first time it said successful then when I went to use it. It said I didn’t have a valid license. So I went back to purchase again."

So it was not a matter of being impatient - CoCalc confirmed success, but something didn't finish yet. It seems that making Payment2 was the trigger to "completely finish" processing of Payment1.

To Reproduce
Unclear, unfortunately. Transactions 117390-117393 are an example.

Expected behavior
After any payment attempt the transaction is failed, successful, or still being processed. If the user is shown "success", no further steps/conditions should be required.

Additional context
This a rare event, but it is recurrent. In particular this "switch" of the payment order in Stripe and CoCalc and very short time between transactions on the CoCalc side.