Solution : https://service.sap.com/sap/support/notes/383942 (SAP Service marketplace login required)
Key words : 
short text 'deactivate header text determination', short text 'deactivate item text determination', /3 support package sapkh40b58 release 4, /3 support package sapkh45b37 release 4, /3 support package sapkh46b25 release 4, inbound delivery text reason, text determination runs, /3 support package sapkh40b54note 340093, /3 support package sapkh40b55note 370837, /3 support package sapkh45b04note 206052
Related Notes : 
       
| 751441 | Consulting: Settings for texts from purchase order | 
| 520457 | Runtime error MESSAGE_TXPE_X when saving inbound deliveries | 
| 370837 | Multiple/incorrect text determination for delivery | 
| 340093 | Automatic packing in inbound delivery VL31 | 
| 119674 | Transfer of texts into the delivery | 
| 53593 | Q&A - Delivery text from stock transfer order |