PDF's saved from illustrator with 'preserve illustrator editing capabilities' do not embed any linked raster images in the Illustrator compatible component. When the PDF is opened in illustrator for editing, a message alerts that the links are missing, and low res images show when opened. The links are present in the PDF portion of the file and can be extracted manually and relinked. Might be a big ask, but it would be more ideal that Illustrator recognises the links are contained within the file, and is able to extract them automatically and embed them into the Illustrator component during opening.