Platform fees for sandbox partner account not received problem

[oggo]

Hello, i have made couple of sandbox transactions and the money is received by the merchant but the platform fees are not received by the platform partner. The accounts and the application are for germany. The transactions are paypal (Guthaben, Visa and Debit card), sepa transfer and also klarna transfer. What could be the reason?

[oggo]

To give an example, here the transaction by the merchant sandbox account:

8. Mai 2021 um 10:46:29 MESZ
Transaktionscode: 604524621H3784910
Zahlungsstatus: ABGESCHLOSSEN
Versandstatus: VERSENDET

Zahlungsart: Online-Zahlung

Zahlungsdetails
Gesamtbetrag
30,00 EUR
Umsatzsteuer
0,00 EUR
Versandkosten
0,00 EUR
Bearbeitungskosten
0,00 EUR
Versicherungsbetrag
0,00 EUR

Bruttobetrag
30,00 EUR
PayPal-Gebühr
-0,92 EUR

Partnergebühr
-0,60 EUR
Nettobetrag
28,48 EUR

As we can see the fee is already calculated by the merchant, unfortunately not available by the partner.