Hi Oscar Holm Hansen
I have seen these errors in other software, like Lightwave. There is something not OK with the UVs ( in the OBJ file ) how they are stored, even though it looks OK. If you have Zbrush, try to import and export with it.
Or send it to milos.lukac@capturingreality.com, so that I can take a look at it in some other software to see what is the precise issue.
But in most cases UVs from Maya are working…