Unknown, we must change the status of the payment to Unknown and act fast to solve the situation so that we are able to either move the payment back to the previous status or to the new one.
In case the payment status is Failed, there will be more information about the reason in the operation result field.
You can find more information on the Result Codes page.
The following is the state machine that illustrates how a payment status can evolve with time after many operations happen to it.
