We have MS Publisher 2016 documents in our SharePoint 2013 environment.
We used to be able to open theese files normally, edit, save and done.
Now the Files are only opening in read only mode and there is NO way to save the files. Every time we save the "Save As" option is the only one available.
A workaround that used to work until a few days ago was to open the "..." and choose edit file. This has now also stopped working.