Shelly 2PM in Cover Mode: Up Button inactive

I am using Shelly plus 2PM for 230V AC covers for 2 years. Now i am using Shelly 2PM Gen 3 for 12V DC covers. 12V DC inhibits calibrating, so there is no cover control.
The Shelly integration now shows the up-button of the 12V DC-Shellys inactive, so that i cannot open those covers in the HomeAssistant frontend. The webinterface of the Shellys is working correctly, i can open the covers in the webinterface an with the physical buttons.
Am i doing something wrong? Is there someting to configure i oversee? Or is this a bug in the Shelly integration?