Seeing live view from NVR and from camera gui should hopefully pinpoint it isn't a setting in the camera but rather an issue somewhere else in your system.
Checked the live view from NVR (connected VGA cable to the NVR).
I see the same issue, though it's harder to notice when not watching frame by frame or in slower speeds.
I have 5442ZE connected to the NVR and covering same area, in the 5442 I don't see this problem (but maybe the position/angle/shadows is the reason).
Spent to much time on this, will keep it as it is.
Wanted to fix this, since I wanted to capture license plates clearly during the day or moving/running objects/people.