Problem with master-detail in APEX 21.1.5

Hi ,

In my app I have created a Master Detail with Drill Down by the assistant

So in the master detail page I have 2 regions :

Master is type of Form and detail is Interactive grid

When I choose an item that already have details, these are shown correctly in the IG according to the generated where clause of the IG.

But when I try to add a detail record in the IG the fk column is not generated as the master column.

What I see is that I can't select the property of Master Column

So I made another master detail with Stacked.

And with this type of page I am able to insert new detail records

And the Master Column I am able to select the parent column

Is this a bug or what did I wrong ?

Thank you for your help

Regards

Jean-Yves