Significantly less information decoded compared to other libraries

Hi, I am noticing a significant difference in the amount of information that is being decoded. For a lot of aircraft the lat/lon is never populated whereas when using view1090 from dump1090_fa, I can see a lot more. I have played around with the distance filter and set the lat/lon as expected, but here are some comparisons: view1090:  adsb_deku radar output:  Is this expected behavior? I compared adsb_deku with several different implementations, including open source and certified commercial ones, and the results from adsb_deku are consistently worse despite using the same antenna and SDR. I also tried various different antennae, with and without filter and using a hackrf instead of an RTLSDR dongle, but I only see a fraction of the traffic being decoded.