@atwist
I know this may be a bit late, I had the same problem on my Raspberry Pi3 after I updated to the latest MM.
I spent some time trying to get Wayland running, but wasn’t really successful. Finally, I changed my mm.sh script to:

#!/bin/bash
cd ~/MagicMirror

npm run start:x11

And that got it working again using: pm2 start|restart mm