Theengs Plug restarting constantly?

Newbie question - I have a Theengs Plug which seems to be working OK, but the sys_uptime value that shows up in HA rarely gets higher than about 2000 seconds (30minutes). This seems to indicate that the devices is constantly restarting.
Has anyone else noticed this? Is there any way to look at OMG logs on the Theengs device to see what might be happening?
Firmware version appears to be 1.3.0.

Never mind. Chat support at pointed out the update instructions here:
User Guide | Theengs Plug Quick Start Guide

and updating to 1.5.1 (via MQTT, of course) seems to have resolved the issue. No restarts so far.