Steps to reproduce the issue

Highlight Search Terms parameter = Yes. The issue can be reproduced with a specific search provided there is no space right after the term in the text. It does not matter what comes after the term: a punctuation mark or a latter (if the search term is a part of a bigger word), the term is not highlighted.

Expected result

Green color - search terms highlighted correctly with mark data-markjs="true", there is a space right after all the terms.

Actual result

Red color - missing highlights because there is a dot right after the terms, not space.

System information (as much as possible)

Joomla 4.3.1 native search
PHP 8.0.3

Additional comments

The issue has been there from the very beginning of Joomla 4.