Deployment view doesn't show the Software System in scope

[gravis]

Question

I'm trying to get my head around the deployment view for a specified scope:

workspace {
    model {
        u = person "User"

        a = softwareSystem "A" {
            aa = container "AA" 
            ab = container "AB"
        }

        b = softwareSystem "B" {
            ba = container "BA"
        }

       u -> a
       a -> b

        development = deploymentEnvironment "Development" {
            deploymentNode "Developer Laptop" {
                softwareSystemInstance a
                softwareSystemInstance b
            }
        }   
    }

    views {
        deployment a development "a_dev" {
            include *
            autoLayout
        }

        deployment b development "b_dev" {
            include *
            autoLayout
        }

        theme default
    }  
}

This only results in 2 two views:

With more complex models, it seems all software systems are presented, except for the one in scope. I'm sure to understand how this view works, could you please help with this?

Thanks