datawedge not firing scanner on MC40, MC32 android with delphi app

A partner has developped an application with Delphi for android and datawedge does not fire scanner when pressing the scan buttons.

Datawedge works well with any native application like email, contacts...

the partner app is very simple with only one input field.

We have tried to configure and use intents with no results. with default profile or a new profile

apk file is attached.

I tried with  MC40 and MC32N0

What may be wrong , or how to workaround this issue please ?