Must. And this will be the case if there is no payment in the process, or there is 1 payment to the CARD with a smaller amount than the amount of the process.
You received 2 payments as a CARD because there are 2 of them in the process
https://adapter.crm-onebox.com/admin/customorder/order/8052/edit/, and not as a result of our settings.
Our setting, if the amount of payments in the process is less than the amount of the process, will add the difference to the array of payments as "type" => "CASH" (cash) and the name "label" => "Payment" (and not CARD).
And since the transfer of several cash payments is prohibited on the Checkbox side, it means that there should be no payments, or only on the card.