keyboard layouts are not updated

I have 2 layouts defined (settings->keyboard->layout) along with shift L + shift R to switch between them.

MWE: Using EN + FR layouts with EN active.

xfconf-query -c keyboard-layout -p /Default/XkbLayout shows correctly en,fr .

shift L + shift R -> changing layout to FR xfconf-query -c keyboard-layout -p /Default/XkbLayout still shows en,fr and not fr,en'.

They can be changed with setxkbmap -layout fr,en but that's more cumbersome.