Thank you for your support. The issue was resolved as I included the below lines in my code, you have discussed in previous related issue that:
**UseRawTextExtraction** by default is enabled. Please set it to false in order to get rid of the issue.
IndexSettings settings = new IndexSettings();
settings.UseRawTextExtraction = false;
Index index = new Index(indexFolder,settings);
Secondly, we’d recommend you to always set
UseRawTextExtraction to false. This improves extracted text formatting for some of the document (for example the document you shared).