Let's Control It

I use FHEM as a controller. But while all values of a real device are sent to the controller (e.g. Temp. and Hum. of the DHT22) only the first value of the four I used in my dummy is sent. One workaround will be to use four dummies, but that's not the good solution.

Is this a bug of the software or a failure from me?

You set the dummy to be either the default single unit (1) or something else. In your case I'd believe a quad sensor is the correct setting.

Of cause You are absolute right - my stupid failure