Bug in year suffixing

[williamliuecon]

There seems to be a bug in the year suffixing when there are (at least?) two authors shared between two works and both are not the last authors.

Here is the source code for a minimum working example to reproduce the bug:
test.zip

Here are the contents of the .bib:

@article{cite1,
  title        = {Title1},
  author       = {A, NameA and B, NameB and D, NameD and E, NameE},
  year         = {2022},
  journal      = {JournalName},
}
@article{cite2,
  title        = {Title2},
  author       = {A, NameA and C, NameC and D, NameD and F, NameF},
  year         = {2022},
  journal      = {JournalName},
}

The years are displayed as "2000a" and "2000b" in the bibliography even though the set of authors differs between the two works. For the bug to occur, the authors B and C can be omitted, but E and F are necessary.

[lstonys]

When there are more persons citing label becomes <first person surname> et al., <year> and then you get:

A et~al., 2022
A et~al., 2022

So extra letters is added to recognize which of the cite refers to which bibliography entry. Without letters in the printed paper you will not know which reference was cited with A et~al., 2022.

[williamliuecon]

I see. Are you sure that's the correct style? I would have expected that for an in-text citation, if the set of authors is different between two works, enough authors' names to make them distinct would be listed, i.e.,

A, B, et al. (2022)
A, C, et al. (2022)

rather than

A et al. (2022a)
A et al. (2022b)

[lstonys]

Bibtex style is provided by publisher and many of the bibtex styles act the same forming in-text citation labels.
If you wish to change it you can add bibliography directly to tex file and edit these labels like:

....
\begin{document}
\cite{cite1}
\cite{cite2}

\begin{thebibliography}{2}
\newcommand{\enquote}[1]{``#1''}
\expandafter\ifx\csname natexlab\endcsname\relax\def\natexlab#1{#1}\fi

\bibitem[\protect\citeauthoryear{A, B, D, and E}{A, B, et~al.}{2022{\natexlab{a}}}]{cite1}
\textsc{A, NameA, NameB B, NameD D, and NameE E} (2022{\natexlab{a}}):
  \enquote{Title1,} \emph{JournalName}.

\bibitem[\protect\citeauthoryear{A, C, D, and F}{A, C,  et~al.}{2022{\natexlab{b}}}]{cite2}
\textsc{A, NameA, NameC C, NameD D, and NameF F} (2022{\natexlab{b}}):
  \enquote{Title2,} \emph{JournalName}.

\end{thebibliography}
\end{document}