Ecobee 4 not responding in Home Kit

Starting a few days ago, my thermostat is listed as no response on my home kit. I've disconnected it multiple times from home kit and reconnected it. I've switched wifi networks and switched back. I've pulled the thermostat off the wall and pushed it back on to reset. The ecobee help line is not accepting new calls.

Anyone have any ideas or something different to try. My other devices on home kit are working fine.

Thanks!