Nope, MD and SMD is not needed. They shouldn't even have that option on the AI IVS cameras as all it does is cause problems.
You have to turn the IVS rules on in the NVR or the camera GUI for them to show up on the screen.
As I mentioned, this camera is on the less than ideal MP/sensor ratio, so it has to work harder as it has the same processor to process 4MP as the 2MP camera. So 4 IVS rules may be causing an issue.
Since it is happening in low light, that is an indicator of either not enough light (infrared or visible) and/or wrong settings.
Some clips of it missing at night or starting and not finishing tracking would be helpful.