Solution : https://service.sap.com/sap/support/notes/157216 (SAP Service marketplace login required)
Key words :
problem short text <-> long text, additional key words iw31, hot package sapkh31i19 4, hot package sapkh40a26 4, hot package sapkh40b14 4, hot package sapkh45a19, function module text_for_header, autyp ne autyp_inst, short text, order header
Related Notes :
| 157211 | Problems for order short text and long text |
| 139480 | Long text contains maint. task list and maint. item |