When a user prints any document to PDF Creator using Adobe Acrobat DC number of pages shows 0.
If you only print the one document/portion of document it works without incident. When you add an additional document and merge, it will wipe content of original document out
First noted on version 2.3.0. Upgraded user to version 2.5.3.
Have replicated issue under Win 7 Pro and Win 10 Pro.