I have Lennar homes also. Try to unplug all the other devices and leave only the APs and the router/modem. Do the APs also fail ?
What is the AP firmware level ? Mine was 200.7 and i returned to 200.6 due to speed issues.
I had a similar issue when i installed a Router Firmware into the ICX instead a Switch Firmware. Lennar/Amazon homes use the ICX as switch and not as a router. That is why you need to have a router between internet provider and the Ruckus IcX. So i installed the Switch version firmware in the ICX and it is working properly now.