I have updated to v1.3.1-rc.1. but the issue persists on my 2G/3G Borons. Device is stuck in “blinking green” with no user code. The LTE Boron is still running v1.2.1 with user code and hasn’t had this issue yet.
After some digging I found this thread Boron LTE stuck flashing green. Base on the information found there, I have downgraded to v0.9.0 and haven’t had a disconnect event yet (~2 hours). I will be monitoring the device over a few days to see if it can recover from a disconnect event with this old firmware. I will be posting updates.
For completeness, the boron 2G/3G I am testing is on an empty breadboard, is using the antenna and battery that was shipped with it, and is connected to a windows 10 machine via the shipped usb cable.