Source - Garbled characters

When the result in the chat quoted my reference file (e.g. [8]), when I put my cursor over the [8], I can read the full citation - e.g. ABC.pdf,page 15. 
However, the export of completed notes in PDF or markdown, will appear as [source:1732759b-ae3c-4c6b-a7dc-1c75ea66fe62,page 15]. 
My goal is that I would like to see my original reference file in the source in a normal way - I hope to see something like [source: ABC.pdf,page 15], is that anything in my setting was wrong or is there any method I can solve this problem? 
Thank you so much!