I have the same with my new (thanks @EMPIRETECANDY) IPC-HDW5231R-ZE. Changed IVS to intrusion area per @aristobrat, which reduces false negatives quite a bit, but doesn't mitigate completely (based on another camera of different brand mounted nearby). OTOH, true positive rate is better than my old camera. Using Target Filter Min Size of (0,0) appears to be best (again low false negatives), but do y'all have recommendations on this parameter? My intended use-case is as an ALPR.