Yikes, I just pulled a newer (WB-700- IPV12) out of an install that's just over a year old. I know "all" the problems were supposed to be with the 600 series from my experience.
The 600's that went bad on us were the controlled outlets only on the units. The 700 model has only 12 controlled.
All the odd ones were power cycling about every 5-10 minutes, FOR ABOUT A WEEK!! The owner didn't tell me until he got back from vacation. I'm sure the electronics that were connected now have a shortened life. I actually wish they had just died and not have kept power cycling.
I'll see what Snap tech support has to say tomorrow (actually later today).