MAX Transit Mini

There are random times that the pepwave will cycle connectivity. It will go on 30min+ then return to normal.

Request if there are any ideas of what would cause this?

Connected to a vehicle (Fire Engine).
Vehicle is connected to a 110v power source while not in use.
Power is continuous
ISP FirstNet (AT&T)
Same indications in Windows system logs.

What is the signal? What are the thresholds you set for signal. etc. have you checked the host AP logs? Is the channel its connecting on changing? etc