[Regression] Highlighting of search results broken in some cases, after PR 13306

Attach (recommended) or Link to PDF file here: https://github.com/tesseract-ocr/tesseract/files/947838/2.pdf

Configuration:

• Web browser and its version: N/A
• Operating system and its version: N/A
• PDF.js version: 2.9.223, or any version after PR #13306 landed.
• Is a browser extension: N/A

Steps to reproduce the problem:

1. Open the document above, e.g. with https://mozilla.github.io/pdf.js/web/viewer.html
2. Search for “of the r”

What is the expected behavior? (add screenshot) Correct highlighting, please see:

What went wrong? (add screenshot) Incorrect highlighting, please see:

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension): N/A

/cc @brendandahl

[CetinSert]

I did my due diligence and report my findings here https://github.com/mozilla/pdf.js/issues/13396. No big deal if closed because PR #12896 is an improvement for most other documents.

I do sincerely apologize for temporarily derailing this issue.

[Snuffleupagus]

Do you (all devs of PDF.js) think #13345 (comment) qualifies for its own issue?

Probably not, given that this is the result of PR #12896 which is an overall improvement for most documents.

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Note that as mentioned in the first paragraph of https://github.com/mozilla/pdf.js/blob/master/.github/CONTRIBUTING.md, we try to limit each issue to just one problem since otherwise it becomes very difficult to track issues efficiently.