@Russ Necroposting as this is pretty much on target for me. Replaced my old computer with a newer one, copied everything over ... triggers work on the PC and from the dashboard here. I've made the new one the default and even deleted the old one but the devices in Alexa aren't triggering. I thought I might need to delete them and let them be rediscovered so I tried that and the newly-discovered ones aren't working.
I'm scratching my head here.