Mp4 colors are wrong in specific size, but right in other

Hi

I have a problem when exporting to this size 627x180px. I have attached a test that shows the problem. In the AE file there are two compositions. 1080x1080 and 627x180. If I chose Composition > Add to Media Encoder Queue and compress via Media Encoder, the 1080x1080 video is correct and the smaller 627x180 is getting a greenish tint. All settings are the same. Only the pixel size is different.

I have also tried to export a mov or an avi and then compress via Media Encoder. Same result.

Do anybody know a solution for this?

Thanks,

Jakob