iPhone orientation flip interferes w/ article display

Hi SA!  
My only complaint with your otherwise wonderful website and app is this:

When I’m reading an article on the site and my iPhone changes orientation from portrait to landscape and back again, the article display will not readjust from wider landscape margins back to thinner portrait margins.  The screen will not allow sliding from side to side in order to read all the text, which forces me to close the app and reload the article.  

Yours truly,

Liz