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 teamSimon Barton commented
Since running the latest update, randomly I can't save, save as, copy or paste. Been working on a document for over an hour hitting cmd-s regularly thoroughout without realising it wasn't actually working.
From this thread it looks like I'm not the only one this is happening to and is a MASSIVE issue.