When opening some documents, the text is being replaced by wingdings. When checking what font is used in the Acrobat editor, the font is named "Z@RFC4D.tmp". The original font that's displayed when the file is opened on another computer is basic Arial. Colleagues at work have no issue when they open the same document.

I had to reinstall Adobe Acrobat to have it fixed. Then, it happened again a couple days later. I'm using Adobe Acrobat PRO 32 bits with paid license.