Using up-to-date pandoc (v. 2.13, with citeproc v. 0.3.0.9), I have a markdown document with a footnote that contains a citation:

    ^[Blah, blah. See @author [Chapter X].]

I would expect this to produce a footnote whose contents is "Blah, blah. See Author (2019, Chapter X)." Instead, I get "Blah, blah. See Author (2019Chapter X)." -- The ", " after the date is omitted. This is true when converted to both .pdf and .html.

This works properly if I use biblatex instead of citeproc to produce the .pdf.

Am I doing something wrong with the format of my citation, or is this a bug in citeproc?