Characters changing when InDesign file is exported to a PDF
I'm dealing with an issue where when an InDesign file is exported to a PDF, certain symbols change both appearance and change into a different unicode. In this case, the hyphen-minus (U+002D), which was being used as a bullet point, changed into a different symbol (U+0171) as shown below.


When it was previously exported, there were no errors. The file was exported again after a different part of the document had a small formatting edit applied, and that was when this error occurred, even though the section of text where these symbols were being used was not touched. So far, I haven't been able to replicate this error.
I would really appreciate any insight as to why this happened, and how I can avoid this error in the future.
