Linear WD500Z keep failing

So I have three sets of lights to be controlled on the same power in. We set up the dimmers and can control two of the three sets of lights via the switch and via the VeraEdge. The VeraEdge sees the third one and says it’s there. The switch acknowledges commands but the light never comes on. The little green led does come on with I turn off the failing switch. Figured we had a bad switch, replaced it, and now a previously working one is failing in the same way. Each switch is tied to the same power, neutral, and ground. The light sets are all working fine. Any ideas?

Ideas:

  1. Incorrectly wired - The switch is not connected to the load.
  2. Incorrectly wired - The circuit’s neutral is not connected.
  3. Incorrectly wired - The light circuit is n-way and has other switches that aren’t turned on.
  4. Incorrectly wired - …