Last tab in TabBar not shown correctly with Fusion style

import QtQuick 2.0
import QtQuick.Layouts 1.3
import QtQuick.Controls 2.0

ApplicationWindow {
    id: root
    width: 640
    height: 480
    title: "qtbug68556"
    visible: true

    TabBar {
        id: tabBar

        TabButton {
            text: qsTr("Instances")
        }
        TabButton {
            text: qsTr("Audio")
        }
    }

    StackLayout {
        currentIndex: tabBar.currentIndex

        Rectangle {}
        Rectangle {}
    }
}