@Eric_Inovelli - Continued problems for this install. I ended up getting the GE 12723 add-on ( aux ) switch installed, following the official wiring diagram. I caped off the extra wire between the dimmer and aux boxes. I configured the parameters via my hub to non-neutral and momentary three-way. I should note one branch of my lights have <25W with no bypass (see above for light box setups). Not sure if that would affect the behavior issue I am having.
The problem I am encountering is the aux switch dims and/or turns the lights off on BOTH sides of the paddle. I cannot turn on or dim up the lights from the aux switch. I saw mentions of this earlier, but cannot find those posts in the forum anymore.
Any insights on how to fix this?
Edit: Everything else works as expected.