Thanks for the reply. That's a good point about the switch to "Eco".
I tried wifi assist at home, but found that it was a big battery drain on my and my wife's phones. It also didn't seem to work consistently, but I didn't put too much effort into getting it to work well, so that may be on me.
In the case with my parents, however, my dad doesn't use a cell phone regularly, so wifi assist wouldn't work well. They have a Simplisafe alarm system, which works with Nest, so I was hoping that when they left and set their alarm to away, it would trigger Nest to switch to away, which could then trigger Almond to switch to away. Same thing when they returned home. Without this link between Nest and Almond's home/away toggle, I'll either have to get more creative with their setup, or some of that functionality will be lost. I was hoping I was just doing something wrong or it was a known bug with a fix coming soon.
Thanks again.