Sentence containing search keyword not shown when searching large PDF file

Summary

When searching large PDF file above 10MB , the sentence where the search keyword appears is not shown.
It appears sometimes , usually if the search keyword is found in the initial pages of the PDF.

Steps to Reproduce

1. Attach a PDF above 10MB to a page
2. Perform Content Indexing
3. Search for a keyword found in the PDF

Expected Results

Actual Results