Fortunately, I think this is unlikely to happen. The problem is that it creates a new document showing the changes, which is not protected. It would be quite wrong for anything in a protected document to be automatically put into an unprotected one. So, a nuisance, but necessary.
Thank you for your feedback!
I 100% agree that creating an unprotected document from a protected document is not a good outcome.
Then assuming that creation of a new unprotected document is a necessary part of the process, why not have the software automatically re-protect the new document in cases where one or both of the original(s) are protected?
I am new to this forum and I would really like Adobe's feedback on this too and I am not sure how best to have them also respond.
Ah, but which of the two files should be the model for security? Actually I've never seen a case of a new document modelling the securitry of the old, there may be a technical reason for that.