Show in Acrobat file name instead of Title metadata
Acrobat shows the document’s internal Title metadata in the tab instead of the actual file name. This confuses users and can unintentionally expose old draft names or client details. From a user experience perspective, this behaves like a bug - users always expect to see the file name they saved, unless they explicitly choose otherwise, and unless the file owner explicitly chooses to permit exposure of that metadata
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David Campbell commented
As an instructor, I often receive files titled "My Report", etc. I want to be able to see the file name I gave it with the student's name to know whose paper is which. Similarly, the title given to a downloaded pdf of an article by the publisher is often not the most informative. Use the name I gave the file, not the title someone else put on it.