Describe the bug
When we add a matrix with vertical length more than 2 and then try to render the content after parsing in our page the parenthesis is not rendered or not visible in the page, when using katex plugin.

To Reproduce
Steps to reproduce the behavior:

1. Add a matrix latex using katex plugin.
2. Save the content
3. Parse the content and view in another page
4. You will see the issue of not rendering the parenthesis

Expected behavior
Matrix parenthesis should visible after parsing and rendering the content.

My version of suneditor is :

Screenshots
Equation added in the editor

After parsing and rendering the content

Desktop (please complete the following information):

• OS: All
• Browser: All
• Version: All

Additional context

• Please find the latex below:
  \left( \begin{matrix} a & b \ c & d \ e & f \end{matrix} \right)