Freeze zones should typically be programmed as type 08 - 24 Hour Auxiliary Alarm. Equipment Type is Freeze. Those are environmental alarm types. Dispatch does not occur on a freeze temp alarm.
Here is a thread discussing GC3 programming for a smoke detector with those three zone types.
However, I see that your SMKT8e is reporting a malfunction again in Alarm.com.
The last test I would recommend is just bringing the SMKT8e within line of sight of the panel close by and letting it rest there for a day. Do you still see supervision malfunctions when it is right by the panel? If so, replace the SMKT8e.