I would be interested if you also have a wrong night focus point. The night picture looks like off focus.
It's easy to do, on the web you look at the focus digit, then release auto focus at night. Make a snapshot, note the new focus value, do the same at day again. Please post the focus values and pictures. This belongs to the night view auto focus issue I noticed and on all zoom lens cams. I need more customers with examples, to raise the pressure on dahua to build a firmware fix.