nested pseudo selectors are dropped within media-queries

[Warry]

see the SSCCE: https://ellie-app.com/3fJXyyDq2a1/5

From this this code, the compiled CSS does not include the firstChild declaration at all. :

styled div
        [ backgroundColor blue
        , withMediaQuery [ "screen and (min-width: 200px)" ]
            [ firstChild
                [ backgroundColor red
                ]
            ]
        ]```