Hi, MyEcobee device has not been affected at all by any platform issues.
I supervise and monitor many customer sites all over the USA and Canada (as some of my contributors prefer to pay for support) and none of them have been affected by any ST or ecobee issues. Some of them have up to 6 ecobee thermostats in a single location and even more ecobee remote sensors and they have not experienced any exceptions or disconnects.
You may want to look into My DTH implementation for more reliability (especially in the winter).
Regards.
P.S. After many months of work, I’ve managed to build many mechanisms to avoid disconnects and timeouts…My Ecobee device is more resilient ( to any ST platform issues) than even the ST stock ecobee device.