It’s only one file, so it’s not in the recents. I don’t have time machine running all day (just for big backups) and i’m not sure what you mean by versions.
I’ve been working on the file all day. I’m kind of a manic CMD+S guy
The only explanation I have is that the auto saving broke someway along the day. Even with autosaveing activ, is is a good idea to press cmd+S once in a while.
And I save as a new file evey few hours of work, at least once a day. I add the date with YYYYMMDD (year+month+day) to the file name.
All this doesn’t brings your glyphs back but might protect you from similar accidents in the future.