This is an issue, possibly for all no high end NVRs NXI-K and NI-K or for those not using v5.0 firmware.
There is no solution for this.
I have installed and gone back to v5.7.15 for at least ten times since first release of v5.7.17 but the problem with Detection and VCA record cannot be solved.
The only thing you can try is increase Motion sensitivity, enable Notify Surveillance Center so that motion Events are separately recorded, reboot your NVR if settings are applied on Camera GUI and expect that only Human and Cars are Detected on Smart Events. If of cource Recognized according to your camera specifications, distance, lighting, Validity etc.
Enable Dynamic Analysis for Motion and other than Human Smart detections do not work.
On the other hand, for those that can use Intelligent Search(if supported by the NVR), the new firmware is perfect and Intelligent search gives back accurate results. Was surprised when first time checked this...
I also would really like to use this firmware, but Detection for Motion and Smart must be fixed.