TYPO3 Core

Backend layout is Broken in Chrome after 5 columns

To repoduce:
Create this Backendlayout

mod.web_layout {
    BackendLayouts {
        subpage {
            title = Sub page test
            config {
                backend_layout {
                    colCount = 5
                    rowCount = 2
                    rows {
                        1 {
                            columns {
                                1 {
                                    name = Inhalt
                                    colPos = 0
                                    colspan = 3
                                }

                                2 {
                                    name = Seitenleiste
                                    colPos = 1
                                    colspan = 2
                                }
                            }
                        }

                        2 {
                            columns {
                                1 {
                                    name = Inhalt
                                    colPos = 10
                                    colspan = 1
                                }

                                2 {
                                    name = Seitenleiste
                                    colPos = 11
                                    colspan = 4
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}