Mac Mail Does Not Save Drafts

Apple, what is the problem with Mail on Mac OS Ventura 13.2.1 running on a 2021 MacBook Pro 14? When closing an email to save as a draft, the app prompts the user: "Save this message as a draft?" For the past 10-20-forever years, clicking on "Save" would then save the message to the Drafts mailbox. Now it doesn't save it ANYWHERE (and yes, I have gone into Mail preferences to verify the mailboxes identified for saving drafts). Saving e-mail drafts isn't exactly Power User technology. Maybe you ought to fix this frikken thing.