Question: High Sierra - desktop on external monitor disappears after wakeup
I have a 13" MacBook Pro from 2016 and an external Dell monitor connected to the USB C port via VGA converter. Before High Sierra, no problem. After the upgrade, whenever the computer goes to sleep and wakes up, my desktop and icons on the Dell monitor disappear. The dock goes back to the MacBook display and the icons on the MacBook display remain where they're supposed to be. I can get my desktop back on the Dell by going to Force Quite and Relaunching Finder. Which is of course a pain to do every time I wake up my computer. Aside from never having the computer go to sleep, what can be done?
MacBook Pro, macOS High Sierra (10.13.1)