TYPO3 Core

If I add a backend layout in the backend or with PageTSConfig and set some allowed content types, this allowed section is ignored and all elements are shown, when adding a content element in this area.

My PageTSConfig:

mod {
    web_layout {
        BackendLayouts {
            home {
                title = LLL:....home
                config {
                    backend_layout {
                        colCount = 1
                        rowCount = 1
                        rows {
                            1 {
                                columns {
                                    1 {
                                        name = LLL:...home_banner
                                        colPos = 1
                                        allowed = header
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

Thanks a lot for your help!