Responsive HTML5 output generated through FrameMaker (2015 release) and RoboHelp (2015 release) is not optimized for newer implementation of Google search algorithm.
The updated publishing process in FrameMaker (2015 release) Update 5 and RoboHelp (2015 release) Update 4 do not redirect topic pages to layout home page. This allows Google to crawl and index information available on the page. Now, when a user clicks on a topic link from Google, the topic page is shown without the responsive layout. However, a Show link is added at the top of the page. When a user clicks the Show link, the responsive layout is applied on the page.
To resolve this issue, republish your Responsive HTML5 output using Adobe FrameMaker (2015 release) Update 5 and RoboHelp (2015 release) Update 4.