I don't think it's something you can manually do. It's happened to me before, but it either that you can't load their picture, or there it's just a bug that can mess up the picture thingy.
funny blue smiling person please to be enjoying lowkido
I believe it's a problem with your internet not loading the picture so it displays the code/name/whatever for classifying it. Which is generally just <insert name>'s avatar.