\citep Not Formatting References with "et al." Using cas-model2-names.bst File [closed]

Question

I am using the \citep command in my LaTeX document to cite references, and I expect it to format the references using "et al." when there are multiple authors, as shown in examples I've seen. However, when I compile my document, the full list of authors is displayed instead of the "et al." abbreviation for the 2nd but not the 1st example.

Moreover, I used the suggestion given in the Tex to its backwards: How to change citation call-outs from authoryear-style to numeric-style?

Here is the setup I’m using:

• I downloaded the cas-model2-names.bst file from this GitHub link.
• My bibliography file is correctly referenced in the LaTeX document.
• I am using the natbib package for citations, and the document class is compatible with this bibliography style.

Here is a minimal example of my LaTeX code:

%\documentclass[a4paper,fleqn,longmktitle]{cas-sc}
\documentclass[a4paper,fleqn]{cas-sc}

% \usepackage[numbers]{natbib}
\usepackage[authoryear]{natbib}

\begin{document}

\section{Sample1}
\section{Sample2}
\section{Sample3}

\section{Bibliography styles}

This is a citation example 1: \citep{menezes2017towards} found that...

This is a citation example 2 \citep{menezes2017towards}] obtained a different result ...

%% Loading bibliography style file
\bibliographystyle{cas-model2-names}

% Loading bibliography database
\bibliography{cas-refs}

\end{document}

Expected Output:

This is a citation example 1: (Menezes et al. 2017) found that...

Actual Output:

This is a citation example 1: Menezes, Samara, Galway, Sant’Anna, Verikas, Alonso-Fernandez, Wang and Bond (2017) found that...

The example given in the Elsevier Template shows as: .

Whereas the other option \citet gives a similar result.

Output:

cas-ref.bib file

  title={Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent pellentesque ex id ligula efficitur},
  author={Menezes, Maria Luiza Recena and Samara, Anas and Galway, Leo and Sant’Anna, Anita and Verikas, Antanas and Alonso-Fernandez, Fernando and Wang, Hui and Bond, Raymond},
  journal={Lorem ipsum dolor},
  volume={21},
  pages={1003--1013},
  year={2017},
  publisher={Springer}
}

@article{luque2019impact,
  title={Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent pellentesque ex id ligula efficitur},
  author={Luque, Amalia and Carrasco, Alejandro and Mart{\'\i}n, Alejandro and de Las Heras, Ana},
  journal={Lorem ipsum},
  volume={91},
  pages={216--231},
  year={2019},
  publisher={Elsevier}
}

Update

For references cited a second time, the output is as expected. In the image below, Examples 1 and 3 are in an incorrect format, while Examples 2 and 4 are in the expected format.

\section{Bibliography styles}

This is a citation example 1: \citep{menezes2017towards} found that...
This is a citation example 2: \citep{menezes2017towards} obtained a different result ...

This is a citation example 3: \citep{luque2019impact} obtained a different result ...

This is a citation example 4: \citep{luque2019impact} obtained an expected result ...

Output: