This issue occurs in Kubuntu 20.04 even with gnome-icon-theme installed. The panel icon/applet goes missing while ibus-daemon is running. The keyboard shortcut to switch input methods also stops working.
Workaround:
ibus-daemon -rxd
This restarts the daemon, and causes the icon/applet to appear in the panel and makes the keyboard shortcut to work as intended. This workaround is temporary and has to be repeated every time the issue occurs.
This issue occurs in Kubuntu 20.04 even with gnome-icon-theme installed. The panel icon/applet goes missing while ibus-daemon is running. The keyboard shortcut to switch input methods also stops working.
Workaround:
ibus-daemon -rxd
This restarts the daemon, and causes the icon/applet to appear in the panel and makes the keyboard shortcut to work as intended. This workaround is temporary and has to be repeated every time the issue occurs.