XFCE screen not updating for most apps after recent update

After a recent zypper dup, my XFCE desktop stops updating after certain apps are opened. Opening the Whisker menu will trigger this state, as well as Firefox, YaST, Konsole, and Dolphin. The standard “Applications Menu” and Thunar work as expected. Once I enter this state, the screen stops updating, except for the mouse pointer. If I go to another virtual terminal and come back, then I see the current state of the screen again (but it still doesn’t update). If I kill XFCE with ctrl-alt-backspace, when I come back in, it works normally again, until one of the “bad” apps is opened.

The system is an AMD laptop with Carrizo graphics. It’s using the AMDGPU driver.

I’m not sure how to troubleshoot this. Any ideas would be appeciated.

Ok, I’ve done some more troubleshooting, without any success, but I learned a few things:

-Logging in as root has the same problem (so it’s not just my user account)
-ICEWM has the same problem, so it’s not just XFCE
-I turned compositing off in XFCE and that made no difference