Tuya-type thermostat TS0601 preset-mode unnecessarily updates every 20 seconds

[Wolly76]

Hi Folks
I've got two types of thermostats: Tuya-type TS0601_thermostat and Tuya-type TS0601_thermostat_1.
The later is an updated version but not fully supported in the zigbee2mqtt plugin in Domoticz. Some items are (yet) not available (max_temperature, min_temperature, window, heating, boost_heating, boost_heating_countdown). Hopefully, this shortcoming will soon be solved.

However, I encountered another issue that is a bit annoying: the "preset"-item is updated every 20 to 30 seconds and then triggers an event (although, the update does not change the value "manual"). I wrote a script that should be activated when the preset-mode changes but now the script is fired every 20 seconds.

I could not figure out, if this is caused by the device, zigbee2mqtt, the domoticz-plugin or domoticz. Does anyone has an idea? Is there a possibility to fix?

Many thanx in advance.
regards,
Wol