System Preferences search no longer highlights possible matches Spotlight would mark matches when searching in system preferences are no longer appearing. I have "System Preferences" enabled in Spotlight prefs. I have searched for a solution to this, no luck. Any help will be greatly appreciated.

Screencapture showing the issue
How long have you waited since checking the box?  It can take some to re-index.  Or you may need to force a re-indexing.  You can do this in terminal by deleting the index and rebuilding it.  This may take a while.  Go to Terminal in Utilities folder and cut/paste this into the command line:  

sudo mdutil -E /