This is normal but if you install the following builds for sdr#
SDR# Dev (Continuous Integration, Last Changed Rev: 977 )
SDR# RTLSDR Plugin (Continuous Integration, Last Changed Rev: 977 )
it should go away if you select one of the options under the rtl-usb settings. Im not on my main machine but when i do get on it i will tell you what setting it is if you don't already find it yourself.
Elad-sw1 & sw2•SDRPlay RSPx4•Afedri-Net•Airspy-v2/Spyverter•Uniden 396XT & 996P2•Tytera MD-380•Alinco DJX11•Baofeng UV82L & UV5R