Gain not set correctly

When initializing LimeSDR Mini in RTLSDR-Airband:

type = "soapysdr";
device_string = "driver=lime";
gain = " PGA=10, LNA=20, TIA=5 ";
sample_rate = 30.0;
centerfreq = 132.0;

The logfile returns:

SoapySDR: device 'driver=lime': gain 'LNA' set to 18.0 dB
SoapySDR: device 'driver=lime': gain 'PGA' set to 10.0 dB
SoapySDR: device 'driver=lime': gain 'TIA' set to 0.0 dB
SoapySDR: device 'driver=lime' initialized
Rx calibration using INTERNAL loopback
Rx ch.A @  132 MHz, BW: 30 MHz, RF input: LNAW, PGA: 22, LNA: 7, TIA: 1

Any suggestions, why the gain isn’t set correctly?
Thanks a lot.

BTW I also posted this issue at github:

Assigned the issue on GitHub and hopefully someone will take a look soon.