From your picture, I think you mean that the single line wire has insulation stripped part-way to accommodate the screw terminal on the left switch and then continues as the same single continuous...

The Device itself and the documentation shows the HS210 can be installed at either the Line-Origin End OR the Load end (and indeed the common terminal on the device is marked Line/Load) Now obviously...

@dmd4home happy to work through this with you and pleased you have at least found the issue, if not yet quite the ultimate solution! Were you perhaps using some whites as travelers? Might you...

@MikeandMary Our girl Alexa can be really fickle :) I have a water recirculation pump by company called Chilipepper - My Show device responds to turn on Chlipepper - if I tell it from another room on...

@MikeandMary I think the answer is as simple (hopefully) as adding light(s) to your device name i.e. porch lights works, bedroom (blank) does not

I love a good mystery! :) dmd4home wrote TP-Link makes it clear that the switch can go at either end as they even label the connection "Line/Load". I follow your logic....it needs constant power to...