Add me to the list of users impacted by this issue. I have 4 ecobee thermostats. When I used Smartthings default handler, I was able to add them to Webcore. But I needed to control the program, so I switched to Ecobee Suite handler, and now I am only able to add 3 ecobee thermostats to Webcore. If I add the 4th one, I get the listAvailableDevices timeout described above.
Live log with 3 ecobee thermostats:
4:17:42 PM: debug getChildDevices(false), children=0
4:17:42 PM: debug Generated list of devices in 16237ms. Data size is 29560
4:17:37 PM: debug getChildDevices(false), children=0
4:17:37 PM: debug Generated list of devices in 15867ms. Data size is 29560
But with 4 ecobee thermostats:
4:24:27 PM: error java.lang.reflect.UndeclaredThrowableException @line 1712 (listAvailableDevices)
Is the issue that the API call is timing out on ST side? Or is the Webcore Suite device handler taking too long?