Left Clarity at the airport for 10 days, hoping to pre-heat her on the way back. When landed, used Hondalink to start heating. It kept saying “ waking up car” or something like this, but failed several times. Battery was at 60%, and car responded to “refresh” in the app. Came to the car, she started ok and took me home. Why..
I, too, have been frustrated trying to get that Honda App to wake up the car. Try locating the car with the app. Sometimes, but definitely not every time, this will wake up the car such that you can do things like remote climate control.
4g. AT&T shut down their 3g a few months ago. On the sleep issue, I've also found that "locate" has a better chance of waking it up.