Invoice paid but not marked as paid

[chapman]

I have a client who paid an invoice online with a credit card. The transaction appeared at the bottom of the invoice in the admin and the payment appears on their bank statement, as well as on my gateway log. But for some reason the invoice did not get marked as paid in WHMCS.

 

Later the client called to inquire about the issue after they received a late notice. I had to manually mark the invoice as paid in the system, as they obviously paid.

 

Have anyone else seen this behavior? What could cause it? This is the first and only time I have seen it.

 

I'm using the latest 4.2.1 release.

[WHMCS John]

Which payment gateway are you using>

Check Billing > Gateway Log to see if there's any sign of the transaction.

[chapman]

Yes - the transaction appears in the gateway log as successful. I am using Authorize.net.