Editors role includes permission to create image in media section.
While standard way of publishing an image is working as expected, the multiupload is disabled and can't be used.
Other limitations like language aren't processed correctly by multiupload too.
Moreover there are constellations of role limitations where multiupload is enabled but doesn't work. An error occures after choosing upload images. (Something like "user doesn't have permission on content create for location_id xy, section_id xy")