When generating a Word document from an HTML file, part of the mathematical formulas is missing

When I used Aspose version 22.4 to convert an HTML file to a Word document, I found that some characters in the mathematical formulas were missing. I switched to the latest version 24.8, but the same issue still existed.
The HTML file itself opens normally in the browser.
I hope the result is as shown in the picture.
0910.zip (56.0 KB)

@hlgao Unfortunately, it is not quite clear what is missed. I do not see the problem on the screenshot provided.
HTML:

MS Word:

@alexey.noskov
In the Word document, the H in the mathematical formula NH4Cl is missing, leaving only N4Cl.

@hlgao
We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): WORDSNET-27368

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.