Source is a SQL Server, it on premise and connected through a gateway.
From Flow I call a Stored Procedure, in which I have declared an output parameter
@XMLFile XML OUTPUT
Now I don't get back the output parameters from my stored procedure, see picture

I noticed when I do this in an Azure SQL Server instance, so whithout a data gateway, it will return the output parameter as expected.
So my question is if anybody knows if this is a bug, a limitation or If I'm doïng something wrong?
Hope someone can help.
Paul