I generally suggest rebooting once you have everything installed - this should free up any resources required during the install/authentication that really aren't needed again unless/until you re-authenticate again...
And if you experience issues again, try reducing the polling frequency to 2 or 3 minutes...in-between polls the Suite doesn't use much (if any) resources...
There is a problem with open contacts helper app. If thermostat is off and contact was open and closed. App turns thermostat on , and sets last known running mode.
I added the logic to leave the AC off if it was already Off when the first contact/switch would have turned it off...it wasn't there before today, Version 1.7.08 includes that new functionality...
I'd suggest not requiring a SMS number under Ecobee Site Manager Preferences (or including a toggle switch to disable that function, if desired.)
EDIT:
Also, very impressed with this over the built-in Ecobee Integration app; lots more variables available and hopefully the functionality is better. I found with the built-in app that any of the fan control settings (on/auto) from HE would result in the Ecobee holding the current programmed temp, instead of turning on/auto the fan.
I suggest that you re-authenticate in Ecobee Suite Manager - for some reason, you got bumped from the secure connection to Ecobee...it may have happened last night when the Ecobee Servers where down for an extended period of time...