I have a VisionPro IAQ thermostat and I've noticed this strange behavior twice in the last few days. I am running 3 CPH on heat. Right around midnight, it did 3 very short runs with very little OFF time between runs, during a period of about a half hour, and then resumed normal cycling at about 3 CPH. Load is about 50% at this time, so normally runs are about 10 minutes ON and 10 minutes OFF.
11:56pm to 12:04am (8 minutes ON)
1 minute OFF
12:05am to 12:12am (7 minutes)
3 minutes OFF
12:15am to 12:23am (8 minutes)
After this, it ran several cycles of about about 10 minutes OFF and 10 minutes ON.

Is this strange or what?