I have a NVR 4208-8p-4ks2 with a PTZ DH-SD59432XA-HNR. Since late summer I have had the play back skip over motion detection and stop at places that does not have a motion mark but does show motion. I will post a clip of what I am seeing. It will start by skipping over the first 4 motion marks. I will post the firmware info for both.
