Search Results Snippets for PDFs - some include highlighted keyword matches, some don't

Hi,
We are indexing and searching a bunch of PDFs. Currently in the results page, many items show the relevant text with highlighted keyword matches, which is what we’d like, but some of them don’t – instead, they show text from the beginning of the document.

From the latter group, if I open the PDF individually and search with command-F, the term does appear in the body of the document, so I know it’s in there.

How might I get all the search results to show the relevant snippets?

The config file includes:
query_processor_options=-stem=2 -SF=[f,d,c,title] -SBL=1500 -MBL=1500

I also tried adding “-SM=qb” to those options.

Thank you for any suggestions!

This is also true when I look in the cached version of the PDF’s text (via the caret in the search results) – even when the keyword does appear in the cached text, it sometimes does not appear in the item’s search summary.

Hello,
Is there any news on when this might be addressed? This continues to be a blocker for us.