Text within shortcodes removed from front page excerpts

When I use a shortcode within my bibletruths.org posts, for example, [su_highlight]to highlight important words and phrases,[/su_highlight] the words within the shortcode are removed from the excerpt on the front page. This is particularly troublesome because those words are particularly important. According to the ultimate shortcodes author, this is caused by a known problem/issue/bug in wordpress. They recommend a solution that is described in this article... https://wordpress.stackexchange.com/a/185305 Can you add this filter to the theme so these words will not be removed?