Unable to save changes to a draft email in Draft folder for IMAP accounts

Is Microsoft working on fixing this issue? 

https://support.microsoft.com/en-us/office/unable-to-save-changes-to-a-draft-email-in-draft-folder-for-imap-accounts-235f3edd-758c-4592-8958-44f8091e36a9

It has been a few years and the latest 3 or 4 versions of Outlook are still affected. Why is this problem so difficult to solve?  

The steps in the suggested Workaround are not clear. Would someone please explain them in more details? Your help will be greatly appreciated.