Hi Tomilio
Received the monitor on 27/09/2020. I'm working on the assumption that this is a model that is AFTER the whole panel thing with "letting light through". I didn't notice any green discolouration, but I'll be happy to check the monitor again for you later, once I'm home.
Do you have this with all picture settings?
The only thing that is "normal" would be if you activate some kind of overdrive, because then the strobe backlight, i.e. flickering, is visible on most panels. However, this is intentional (for the ultra short response time) and does not represent a defect. Depending on the user, this is more or less annoying and is also more or less visible in different scenarios.