Solution : https://service.sap.com/sap/support/notes/1769975 (SAP Service marketplace login required)
Key words :
URL escaping, UTF8 Mojibake, garbled, special character, CL_ABAP_DYN_PRG=>ESCAPE_XSS_URL, ict/unescape_no_utf8
Related Notes :
| 1629598 | SAP Kernel 720 will replace older kernel versions |
| 1582870 | ABAP XSS Escaping Support |