Steps to reproduce the issue

In an article, create a page break like this

<hr class="system-pagebreak" title="Nutrition as you grow older" />

Add some other text, do not include the word "nutrition" anywhere else.

Expected result

After the content has been indexed, and "nutrition" searched for the page should show in the search results

Actual result

This page does not show in the search results unless the word "nutrition" is included somewhere in "ordinary" text.

System information (as much as possible)

PHP Built On Linux uk15.siteground.eu 3.12.18-clouder0 #20 SMP Mon Feb 26 12:15:53 EET 2018 x86_64
Database Type mysql
Database Version 5.6.40-84.0-log
Database Collation utf8_general_ci
Database Connection Collation utf8mb4_general_ci
PHP Version 5.6.38
Web Server Apache
WebServer to PHP Interface cgi-fcgi
Joomla! Version Joomla! 3.8.13 Stable [ Amani ] 9-October-2018 14:00 GMT
Joomla! Platform Version Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT
User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36

Additional comments

I'm not sure if this is possible to achieve, my clients are very surprised it does not work as from a users point of view, when you look at your site on the front-end, it's clearly there in the text! (They are not overly happy about the thought of going through their content and checking that such "keywords" are in ordinary text, but they'll just have to do that for now) Thanks