Adobe Illustrator opened an older version of file

I made an Illustrator file and embedded it in an InDesign file. The InDesign file looks fine - the Illustrator file (which is saved as a .pdf) appears as my latest saved version and there are no errors or updates associated with it in the Links panel.

However, when I open the source file in Illustrator, it looks like a version from a few hours earlier. It does not match the embedded file I'm seeing in InDesign. At least I have a visual copy and can redo the work to match. But what happened to my latest version? And how am I seeing it in InDesign?