Erratic Behavior - Repeated OLL ON events

[hchain]

For the past few weeks, I experience random ON ALL events. There is no event (like a motion sensor, etc.) triggering the ALL ON, it's just happen. Seems to be restricted to a 2-3 hours window in the evening.

I updated the Firmware/UI to 4.6.2 and change the location of the PLM through the house.

 

I installed the system 3 years ago or so. I had these events may twice a year before, but now they are daily, and most often happen 2, sometimes 3 times in a row at 10-15 minutes intervals.

 

Can someone point me to what I should look for to get started?

[drprm1]

http://wiki.universal-devices.com/index.php?title=INSTEON_Random_All_On_Events