Since you are having trouble with devices 5 and 8, are they on the same phase that the XTBR is plugged into? Since you don't have a coupler, even a minor signal sucker on that phase could prevent an adequate signal from reaching them. Or there may be a noise source on that circuit or phase.
Jeff
thanks Jeff, and those are all valid points. The XTBR is plugged in to the outlet right below the garage's main panel that feeds neither 5 or 8.
The misbehavior started before the Christmas lights went up, so I cant blame that.
Code 5 runs off the main panel outside, code 8 runs off an outside subpanel unique to gazebo, and all the other x10 stuff (mt14 and transceivers) runs off the garage's subpanel.
I've been hesitant to shut off circuits 1 by 1 because I have 3 panels, so that will add a lot more possibilities. The majority of the household crap that is plugged in goes to the garage's subpanel. The gazebo panel has a small refrigerator plugged in that has been there since day 1, and the main panel has the pool pump, the pool light, and 2 regular outlets.
I guess I could try this approach to hopefully find a culprit circuit. This testing will be more complicated because a visiting family-in-law owns 3 ipads that are constantly charging. Of course, I will unplug them to test.
1) Turn off circuits in the gazebo and test
2) Turn off circuits in the main panel and test
3) Turn off circuits in the garage panel and test