gtk4: window drag gives Warnings

[casesolved-co-uk]

I get a lot of gtk warnings printed when I move the browser window:

(litebrowser:4095): Gtk-WARNING **: 16:11:15.443: Broken accounting of active state for widget 0x7f9fcaf985b0(gtkmm__GtkHeaderBar)

(litebrowser:4095): Gtk-WARNING **: 16:11:15.443: Broken accounting of active state for widget 0x7f9fcbb09930(gtkmm__GtkWindow)

(litebrowser:4095): Gtk-WARNING **: 16:11:15.445: Broken accounting of active state for widget 0x7f9fcaf98ca0(GtkCenterBox)

(litebrowser:4095): Gtk-WARNING **: 16:11:15.445: Broken accounting of active state for widget 0x7f9fcaf98940(GtkWindowHandle)

(litebrowser:4095): Gtk-WARNING **: 16:11:15.445: Broken accounting of active state for widget 0x7f9fcaf985b0(gtkmm__GtkHeaderBar)

(litebrowser:4095): Gtk-WARNING **: 16:11:15.445: Broken accounting of active state for widget 0x7f9fcbb09930(gtkmm__GtkWindow)

(litebrowser:4095): Gtk-WARNING **: 16:11:15.454: Broken accounting of active state for widget 0x7f9fcaf98ca0(GtkCenterBox)

(litebrowser:4095): Gtk-WARNING **: 16:11:15.454: Broken accounting of active state for widget 0x7f9fcaf98940(GtkWindowHandle)