Domain mapping not working correct

I am setting up a new site http://www.computerhjæ and this name doesn’t really Work for me..

When testing from chrom, I get to the right page. Firefox loads some of the page correct. As does my iphone safari browser. Microsoft Edge gives me different site on the server..

My other sites are fine – so I think it has something to do with the Danish character ‘æ’ that screw Things up?