I have the latest version of Evernote and I'm on Big Sur. When I annotate a graphic that's part of a note, sometimes the only thing in the note, after I annotate, save, and quit out, when I go back in later, the entire graphic will be deleted from the note. I have to go into note history and restore the previous version. I've now stopped annotating and just typing in changes above the graphic.
This has happened multiple times now.