I have a one-page Publisher document into which I have placed (linked) many copies of a Designer file, using artboards to place different figures. Whenever I re-open the Publisher doc, I get a notice to open the Resources Manager, which then shows that the linked file is missing. Yet the path in the Resources Manager is correct, and when I click "reveal in Finder", it's right there. It's a 20 MB Designer file and also takes a long time (minutes) to "replace" the missing file with itself to fix the broken link.
Also, the "remembered" size of the linked file here shows as 33MB, but it's actually 18MB. When I replace it with itself, it shows correctly as 18MB.