"Mobile Broadband" problem under Ubuntu 18.04

I connect the mangoh red with WP77xx to Ubuntu 16.04 via USB and the interface shows as “Ethernet Network (Sierra Wireless WP7700)” and I can ping, ssh, etc. to

However if I connect to Ubuntu 18.04 it thinks the interface is a “Mobile Broadband” and I can’t do anything. Has anyone else run into this and found a fix?