AGN day/ vs. night reticle movement

Hi all. I have an AGN sight mark pro 4k 5x20. Not sure if it’s me or the scope. Shooting during the day I have zero issues on targets. At night when I’m setting I am not as accurate. It’s the same distance, slugs and reg pressure but I’m not getting as many kills as I would think. Just wondering if there might be a POI shift between day and night or is it the shooter?