P2: Important Description
Loading local resources without having a local base url (a proper security origin), causes creation of "broken image" images instead of the requested images. The "broken images" do not get created in 5.6.
Figure out if the "broken images" should not be created, just like in 5.6, or alternatively adapt the test.
Things to note:
1) If images are first requested with a proper secure origin, and afterwards without one, the "broken images" are created.
2) If images are requested without a secure origin from the beggining, the "broken images" do not get created, and the test passes.
It appears there is some dependency with leftover images, or a race-condition in regards to creation of images.