If you are still experiencing this issue (as some of you are), please respond to the email that has been sent to you.
While the issue has been fixed for certain scenarios, it looks like there are some remaining where it is still NOT working as expected. We look forward to finding a complete fix for this issue.
Adobe InDesign teamTony commented
actually, i can't save eitherTony commented
having this same problem. in the middle of working on a project and suddenly no undos