HDR on my new AOC Q27G3XMN monitor looks dull and green-ish compared to SDR
I just bought an AOC Q27G3XMN, as I saw lots of good reviews and especially its VESA certified HDR 1000 and mini-led tech appealed me. The upgrade from my previous MSI G24C4 E2 is great (1080p -> 1440p, mini-led, hdr, 23' -> 27', ...) and I'm enjoying the monitor right now, but I have some issues with HDR.
I primarily use linux but dual boot with Windows so I can make sure the problems are not linux (arch, hyprland) specific. SDR on the monitor looks great, but when I try to switch to HDR the colors look a bit off: there's not a lot of red, it looks a bit greenish.
The first image is hdr, the second sdr. The third hdr again, the fourth sdr. So, the more saturated ones are sdr and the duller ones (where the blur is also a bit weird but that's a linux thing I think) are hdr.
Does anyone know if this is just me seeing weird things (which I don't think is the case because even after not seeing the sdr for a while, I still think it looks off) or the monitor is not calibrated correctly...? or another problem?
I'm quite sure it's not a bandwidth problem because when changing the refresh rate from 180Hz to 60Hz, it looks the same.