[bug, latex writer] Postnotes of \autocites commands may end up after the wrong reference

[seifferth]

In some cases, when producing latex output with the --biblatex flag, postnotes may end up after the wrong reference. This issue seems to occur when multiple references are grouped together but only some of them actually have postnotes.

$ pandoc -t latex --biblatex <<<'[@first, 1; @second; @third, 3]'
\autocites[1]{first}[3]{second,third}

The expected output would have been \autocites[1]{first}{second}[3]{third}. The actual output causes biblatex to render the postnote 3 after the reference for second. The intended behaviour would be for the postnote 3 to appear after third, not second.

Using an "empty" postnote may serve as a workaround:

$ pandoc -t latex --biblatex <<<'[@first, 1; @second, ; @third, 3]'
\autocites[1]{first}{second}[3]{third}