Icons_with_ligatures_v6.1 / icon appearing as text "_menu_3"

Hi there.

I'm using the above mentioned 'icons_with_ligatures' file as found here on the forum - though the issue also remains when using other font icons from other providers.

I'm trying to add this to a Mio R4. I have a 5150 that functions as expected.

Any thoughts on why the button text is not displaying as an icon? (other icons on the nav bar such as wifi signal, work just fine)

thanks!