Colors of output change based on exported dimensions

Hi

I'm having some very wierd color issues exporting from Premiere Pro 2025. Based on the size of my export, the colors change.

It does not matter if the composition is downscaled in Premiere or in Media Encoder. Whatever i do, the colors change based on the size of the video, regardless of the codec.

Can anyone help me figure this out? Thanks in advance 🙂