LG G2 Greenish horizontal band

Hi all,

Last year I bought my first 55 inch oled TV and I'm very happy with it. Although I'm seeing some weird greenish horizontal band on the lower part of the screen on the full width later on.

I tried to make a picture of it, but I have to say it's more noticable on the naked eye than on the picture. It's best noticeable on greyscale, but if you see it you never unsee it again. Especially on even coloured frames you can see the band. But it's just noticeable in general.

Is this normal for a OLED tv? I've already tried a pixel cleanup process but that didn't make much of a difference. I used YouTube on the TV itself to get these white and greyscale pictures. I've also tried a factory reset and some different picture modes but that doesn't help also.

Since I'm in the EU I can't see how much hours I've already have.