Upgraded from Ancient EN since forced to by that EN version stopping Syncs. Now on Windows 10.73.4.
Pdf document inserted into a note, shows filename correctly, opens correctly, often saves correctly.
BUT, maybe twice a week the "Untitled Attachment" replaces the doc's title and is a dead link that does nothing. Horrible feeling to have a key work document disappear.
Happened just now, and for grins I tried the trick of clicking on another note, then returning to the problematic note, and -- the expected title and link and document were restored. But that disappearance does NOT build confidence about future losses.