I have V3 running. I have four Alexa Dots. All reply "Sorry, the device XXX is not responding" On the other hand, My Google Home is controlling the devices just fine.
I had this problem with both Alexa and Google Home when I first updated from V2 to V3. I had to delete all devices and then disabling and re-enabling the skill in Alexa and in Google Home to get them both working again. Last night Alexa started with "Sorry, the device is not responding" again, yet Google Home still works fine to control my ISY.
