Hallo Henri.
I've come across this little thing, ever since two or three releases ago, but I didn't have the time to report it.
When I open the viewer, I can't see display names at the IM and Friends floater, although I have the setting
Always use legacy names for friends list and notifications disabled. If I open the preferences and toggle the setting on and off, then display names show.
I am enclosing clean logs.
System info:
Edit: Typo.