This is a scenario whereby the Issuer has sent a reversal for a chargeback which they previously raised. A chargeback doesn’t need to be represented if the reversal is received on the same date as the chargeback. If the reversal is not completed on the same day then your merchant account will initially be debited for the chargeback and then credited for the reversal.
Please reach out to cbteam@pxp.io for any additional information you need.