Standard OVS bankid no output

Hello all,

I would like to use the standard OVS called "bankid" in a custom screen based on a custom BO. I added the ovs into my screen and bind the BusinessPartnerUUID search parameter. The OVS is displaying research results perfectly :

But when I click on a result, there is no value returned, the field holding the OVS stays empty :

Does anyone know why there is no returning value and how to fix it please ?

I have read 9.3.2.5 Create an Object Value Selector Dialog Box sevral times but I could not find the answer.

Thanks & wish you all a great day