This device is really strange, it is not a matter of configuring auto-off timers as a thought initially ..
Please update to the development branch version 0.3.0 from here :
You will need to pair the switch again to HE. Better delete it first (''Remove device' from the bottom right of the device page) and then pair it again. The driver should be automatically selected.
Let me know if the automatic switching off after 2 minutes will stop.
The price will be that the on/off state of the switch when operated locally will not be reflected in HE.. : ( Please click on the Refresh button on the child devices - does it update the on/off status when clicked manually?
Update May 2024 : this driver is now available for installation and update from HPM.