My issue appears to be similar. If you think this is unrelated I will move on and see if I can find another relevant thread or start a new one.
I have a Honeywell T6 Pro Z-Wave. Most things are working pretty well. I have the thermostat tile on a dashboard. When I try to change the fan mode from the dashboard nothing happens. Even the tile remains at the same setting.
This is a log capture where I tried to change from Auto to Circulate using the dashboard tile. When that failed as usual I changed the setting in the device page which worked. The fan mode displayed on the tile was also updated correctly.
dev:11532020-10-12 11:22:00.164 am trace setThermostatFanMode(circulate)
dev:11532020-10-12 11:22:14.163 am info Thermostat fan is circulate
dev:11532020-10-12 11:22:14.154 am debug cmd:ThermostatFanModeReport(fanMode:6, off:false), desc:zw device: 36, command: 4403, payload: 06 , isMulticast: false
dev:11532020-10-12 11:22:13.664 am debug skipped cmd:ThermostatFanStateReport(fanOperatingState:1)
dev:11532020-10-12 11:22:13.655 am debug cmd:ThermostatFanStateReport(fanOperatingState:1), desc:zw device: 36, command: 4503, payload: 01 , isMulticast: false
dev:11532020-10-12 11:22:13.193 am trace fanCirculate()
Anyone have an idea what's going on there?