title: Wordpress (Woocommerce) Edit address logs me out
body: <p>I hope you can help.
  I've installed Woocommerce for Wordpress and have the following problem.</p>
  
  <p>When a user goes into the page to edit billing address it logs the user out - refreshing the page or saving the new address takes you back into the login screen.</p>
  
  <p>I have no idea how to debug or fix this.</p>
  
  <p>Any help would be much appreciated.
  Thanks
  Mark</p>