When you put, for example, your favorite Bibles in a collection and tick the 'Show in parallel books' box, you should be able to navigate between those parallel resources with the left/right arrow keys.
What often happens, and in the attached screencast every time, is that by hitting e.g. the right arrow key, it does change to the next parallel resource, BUT it accidentally and undesiredly activates the reference box which breaks the arrow-navigating to the next parallel resource.
