There seems to be an issue with the ADC/2GIG Image Sensor regarding malfunction, where it reports "loss of supervision" irregardless of signal strength, and battery reading before malfunction occurs.
The alarm.com Image Sensor and the panel still seems to be communicating, so it appears to be a supervision feature bug...
When my IS reported the loss of supervision malfunction, I did a "peak in now" via the mobile app, the IS malfunction immediately cleared, and so did the panel " loss of supervision" trouble, and peak in image uploaded properly.
I checked the signal, and it was 5/5 bars (which surprised me as it usually is 4/5 bars), battery at a satisfactory 3.43v.
At least for now, until this is resolved (perhaps with a firmware update addressing the buggy supervision feature, note- current firmware version is 200.4), you can remotely clear/fix the malfunction by doing a "peak in"
In my case, I don't use the "daily peak in", but in theory, enabling this feature may prevent the malfunction from occuring.