[Support] Shelly 2.5 in Roller Shutter mode - open/stop/close
**Describe your problem**
How should a window covering button in the Home app should act if the Shelly 2.5 is integrated by the plugin?

I thought it should work the way
```
click button -> blinds opening -> click button again -> blinds stopping -> click once more -> blinds closing
```

In my case it acting like
```
click button -> blinds opening -> click button again -> blinds are immediately closing
```
The stop in between is missing.

**Describe what you have tried so far**
The Shelly 2.5 is calibrated as described in the documentation.
If I write the Shelly Homekit Firmware onto the device, the button is stopping the blinds between opening and closing clicks.

**Environment:**
 - Shelly device: Shelly 2.5, most recent firmware
 - Plugin version: 0.19.1
 - Device running homebridge: Raspberry Pi, Hoobs

Any help is appreciated.

Markus
