Adalm Pluto Simulink Receiver Gain Control

Simulink receiver block the "source gain" can operate in 4 modes:

AGC Slow Attack — Use this mode with signals whose power varies slowly over time.

AGC Fast Attack — Use this mode with signals with a rapidly changing power level.

Dialog — Specify the gain via the Gain (dB) parameter.

Input port — Specify the gain in an input port that is added to the Pluto Receiver block.

I am trying to operate the receiver in mode  Dialog or Input port, it looks like these modes are not working correct.

Thanks,

Albert