Z-Wave switches turn off together unexpectedly daily

This was never on, that is what sent me on this wild goose chase, to begin with. I checked that when @dadarkgtprince mentioned it.

Edit: I see both an app and a skill for Alexa. I assume the skill is still the recommended method. Why is the app still offered? Why not just remove it?

Edit II: I enabled the app in Hubitat and the moment I enabled the skill, immediately both switches turned off! It's like they were waiting for Echo to connect. WTF?!?!?