Steps to reproduce:

1. Configure layout switching using Gnome tweaks as 'Caps to first layout',
'Shift-caps to second layout'
2. Switch layout

Expected behavior: layout indicator displays current layout (language of
layout)

Actual behavior:

1. Layout switches as expected
2. Layout indicator does not change

Note:

Selecting language via indicator changes both layout and icon, whist keyboard
shortcut does not.