security settings are changing after commenting a PDF
Lately, me and some of my co-workers have had a trouble with PDF. We receive PDF files from external people on which we are asked to comment. After we have put our comments, we save the file like we usually do. But then the problem starts, when reopening the document to continue working, the option 'comments' is no longer available. After checking the securty settings, it turns out that in the beginning, all is allowed, but after saving, nothing is allowed anymore.
these are the security settings before saving

and these after saving

I was wondering if anyone else has had this issue and if there is a suitable solution?