I am a new Rachio user. I hooked up a Generation 1, 8 zone system (only uses zones 1-6) just the other day and have been trying to dial it in.
Each time I test it out or run a schedule, the last zone will cause the Rachio to disconnect from Wifi and not allow it to turn off the zone. So the other day after running my first morning schedule, I woke up and realized that the trouble zone (zone 6) was still watering a couple hours after it was supposed to stop and the wifi light was blinking amber or red.
I had to power cycle the rachio to get it to shut off. This has happened every single time I have tested out this zone by itself too. Every other zone works perfectly and I can control it from any device flawlessly.