Related Pages (aka Read More) is not supposed to include non-free images.
At the mobile view for EnWiki article Facial_tissue I just received a RelatedPage link to Andrex, including this non-free image. I verified that image page is correctly categorized as [[Category:All non-free media]]. The file page hasn't been edited in 5 years, so there are no recent changes confusing the situation.
- RelatedPages is incorrectly requesting that non-free images be included; or
- RelatedPages is requesting a free image, and PageImage failing to filter out the non-free image.