Can't seem to save Comments in Analysis

I'm building a library of my own games. The plan is to analyze them, without stockfish, annotating with comments. I can save  a game to Library, open it in Analysis, right click on a move to make a comment.

But what's next? I certainly don't see a save anywhere. My comments are always lost it seems. You can see here I put the text "London" on the third move. But when I open up my Library again, that comment is gone.

I appreciate any help. Thanks!

Partial Solution.

The Save button is only at the bottom of the game! But, even then, it is disabled unless you make a variation. Nasty bug chess.com

The work around is to click away from the move after you've made the comment.