There’s a new slightly updated version of Raspbian for Robots out there.
https://sourceforge.net/projects/dexter-raspbian-for-robots/files/buster_new_firmware_raspbian_for_robots.zip/download
Since there’s now a Pi3B+ version 1.4 out there, a new version of the RPI firmware has to be installed on Raspbian for Robots.
Please note that I forgot to set autoresize when I did that image, the end user will need to manually resize their image after boot up.