Workflow task name changed after upgrade in EHP7

Hello,

Before the upgrade in EHP7, when i create a workflow, i had the following result in the Gateway and in the field "task_name" : WS99900005_0000000068 => it was correct.

After the upgrade, i have this result:

<m:propertiesxmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices">

• <d:workitem_id>000000410113</d:workitem_id>
• <d:status>READY</d:status>
• <d:status_txt>Prêt</d:status_txt>
• <d:subject>Une ligne de la facture 5105601588 requiert votre décision</d:subject>
• <d:type>W</d:type>
• <d:priority>5</d:priority>
• <d:task_name>Une ligne de la facture &1 requiert votre décision</d:task_name>
• <d:actual_owner/>
• <d:actual_owner_name/>
• <d:note_count>1</d:note_count>
• <d:reassign_by>E000059</d:reassign_by>
• <d:reserved_by/>
• <d:act_dec>0000</d:act_dec>
• <d:act_dec_agent/>
• <d:language>F</d:language>
• <d:start_dlm:null="true"/>
• <d:end_dlm:null="true"/>
• <d:created_at>2014-08-28T09:46:35</d:created_at>
• <d:created_by> FLOWITEM 0000004100970000000051000000</d:created_by>
• <d:gui_link>/sap/bc/gui/sap/its/webgui/?sap-language=FR&~transaction=*/iwfnd/wf_webgui P_WI=000000410113;P_TASK=TS99900071;P_SYS=LOCAL;DYNP_OKCODE=OKCODE</d:gui_link>
• <d:mime_type/>

Any ideas?

Abdrahim