Chromebook Go, connects quick to LTE on boot, then drops connection less than 1 minute. Often requires me to click the icon to disable then re-enable, and wait, adding 5 min to boot time.

I also have the same issue, but I think its because chrome os is meant to connect via WiFi or ICS (internet connection sharing) from your device. Once it's connected to via those ways, then the LTE or 5G kicks in.