Hi Merlin, fancy seeing you here!
If you have recently updated the SDRUno software, try doing a ‘reset to factory settings’ via the OPT menu. When I went from v1.3 to 1.4 I had a number of weirdos going on, including gross overloading at any gain setting and malfunctioning controls. A reset put it all right. If it’s a no-go, a quick support ticket via the main website will get some attention.