This reference article (CPS) confirms the bug of which I speak:
Some releases of Acrobat include changes that could affect legacy workflows. Deliberate changes or accidental bugs can affect the compatibility of a specific product version and an existing workflow. For example, a critical security change can require you to configure your clients to operate a particular way. Or a bug can make it necessary for your organization to skip a particular dot release.
This article lists changes across releases where those changes could adversely affect Acrobat products in enterprise settings.
Bug: Interdocument links referencing nonPDF files do not work. When you click links in a PDF that point to nonPDF files such as .doc, .ppt, .xls, and so on, then an error dialog is displayed:
"Windows cannot find <name of file>. Make sure you typed the name correctly and then try again."
This problem is only associated with links that launch an application. Web links do not exhibit this problem. You can identify web links by hovering over the link and seeing if there is a "w" on the hover icon.
A fix is currently under investigation.