XB7 / HomeKit

I just migrated to Xfinity from Fios and my entire HomeKit network has crashed. I cannot connect any of my smart devices (iSmartGate garage door opener, Ecobee 4 thermostat with 4 remote sensors, Rachio 3 sprinkler controller). Here is what I have tried so far:

• Separating 2.4/5 WiFi networks
• Disabling 5 WiFi network
• Hard reset of iSmartGate garage door opener
• Erase HomeKit settings in Ecobee
• Hard reset of my HomeKit home 

Nothing has worked. Oddly, I can see in Xfinity admin that my garage door opener is listed as a connected WiFi device, but I cannot see it in the iSmartGate app and the Home app just spins and spins until telling me it cannot add accessory.

Please help!