Solution : https://service.sap.com/sap/support/notes/495960 (SAP Service marketplace login required)
Key words :
entered data disappears, terms payment cards, prerequisites fields cvval, fields added, typing errors, pressing 'enter', cvvst reason, field transports, internal processing, directly corrected
Related Notes :
| 426724 | CVV: New fields on user interface |
| 426723 |