Back again with update. I have rebuilt the home page just for testing. The problem still there. Desktop fine, tablet fine. Mobile though open again as small on the left side of the screen and then jump and center itself. I've spent the last 3 days to find the root of the problem but I can't. The only way I can fix it is if I disable fit to page width on the export menu. But this mean I have to build a tablet variant and I don't really want to do that. My settings are 1440px - 720px and export 1600. Any help it will very much appreciated. It's only one page I tested with, so there is not any conflict with the size of the site.