@Adam_Martin, Please follow the instructions that I posted above and PM me the logs.
I haven’t received anything from bostonalex, so I assume that his ecobee issue is solved.
FYI, ST has acknowledged that there are some connection issues with their cloud-to-cloud connection to ecobee in this post:
But, there is no ETA from ST to solve this connection issue for the moment. So, you may want to try to reconnect to ecobee (re-login even if it’s said that you’re connected) from time to time using MyEcobeeInit to reset the connection between the 2 platforms.