I have a old echo, a dot and since a few months a echo 2. The echo 2 occasionally does not respond when trying to send commands to the homeseer skill. It is not showing a red not connected led at the top. But when I look in my Alexa app, all but the echo 2 are online. The echo 2 is offline. The only way to get it working again, is set it up again. Which is a pain, especially as it normally doesnt work the first time. After I successfully set up my wifi again, all is good again (for a couple of weeks...) Connectivity to my wifi is no issue, the AP is in the same room, no obstacles, about 3m away... all the other echos and dots are a lot further and through walls and do not have this issue.