Honeywell TCC 6000 Thermostat in Smartthings is not changing the thermostatOperatingState

My Honeywell TCC 6000 Thermostat in Smartthings is not changing the thermostatOperatingState from idle to heating or any other state. I can force heating on and I see the heating icon on the Honeywell TCC app on my phone, but the state in Smartthings IDE remains idle. All this was working so I called support and I was told some changes had to be made to get this thermostat working and this variable was removed.
Now my automatic keen vents don’t know when to open or close. Where is the smart part of Smartthings now? I don’t think to remove a variable/function that was available should be done. Plus I have a gas log slaved off of the main thermostat that is no longer turning on because of this.
As far as I understand the device handler for the device is not published. Does anybody have any idea how to get this working again or do I need to buy a new thermostat?
Or maybe Smartthings could publish older device handlers as a selection for devices, like a revision selection. With this user that want to keep the older version could select it manually.

There have been other issues with Honeywell thermostats lately. Not just your model. I wonder if all these issues are related.

As far as I understand all this is a cloud to cloud implementation. I would assume the SmartThings developers have everything on there side under control. But maybe the Honeywell API part is tricky. But the Honeywell app on my Android phone works fine too. If this cannot be fixed soon I will probably look at something I can control without the cloud (I have a spare Zwave CT80, but their temperature sensor is off). I need the gas log to turn on in winter. This was the main reason for me to get Smartthings in the first place.