Select User Screen showing generic icons and not "letters"

Just in the last couple of days I’ve noticed that when firing up Plex on Roku it comes to the regular Select User screen and whereas before it showed the “letter” of the Users first name, it now shows a generic icon with the silhouette of 3 people. It still works fine, and once logged in you can switch users and the “letters” appear on the Select User screen as before. This seems to be restricted to the first Select User screen when launching the Plex client to begin with. Any ideas?