Applications using gdk-pixbuf display some photos with incorrect orientation. Fixed for me by applying to 2.26.5 the upstream patch: https://git.gnome.org/browse/gdk-pixbuf/commit/?h=gdk-pixbuf-2-26&id=ff9d69d5328abd846b2c66e3ed5ad0e90de8f5d8
I can confirm, that this solves the issue.
Should be fixed in 2.28.2