Shutdown dialog box does not work in premade raspbian processing image on 3B+

I installed a fresh download of the pre-made image on my new 3B+ and when I click the shutdown dialog box… nothing happens. It pops up but when I click the shutdown button, it just sits there. I wind up having to use the terminal to shutdown safely.

Has anyone ran into this before? The same image works absolutely fine on my 3B. I got the 3B+ in hopes of boosting performance a tad.