For me bug also fixed when I just set desired settings to xkb:
setxkbmap -option grp:rctrl_toggle,lv3:menu_switch us,ru,ua
without disabling standard gnome switcher. So, gnome switcher switches keyboard layout indicator, xkb switches real layout.
For me bug also fixed when I just set desired settings to xkb:
setxkbmap -option grp:rctrl_ toggle, lv3:menu_ switch us,ru,ua
without disabling standard gnome switcher. So, gnome switcher switches keyboard layout indicator, xkb switches real layout.