Yes. If I only change the display name it will very briefly look like it’s doing some kind of backend update, then the field will get cleared back to nothing. If I also change the theme and update the display name, the name it will persist after the “save” process and the theme will appear to applied, but all changes are lost if I refresh or navigate to a different page. The display name is never applied to any posts and never changes in the account actions menu in the upper-right.
Still waiting to see that pasty technofascist to show up to any of his fistfights.