Popup does not display images anymore

Hi guys, happy new year.

Ive just noticed that Popup pro seems to be broken with the latest version of WP. When I add an image to a popup via the text editor. It seems to work fine when viewing the text editor but when I preview or view on live site it changes the url of image etc

This is the code displayed in editor:
<img class="alignnone size-large wp-image-11915" src="http://www.mywebsite.com/wp-content/uploads/2016/01/popup-1024x662.jpg" alt="popup" width="1024" height="662" />

Yet this is what it generates on the frontend which obviously just breaks the image:
<img class="\"alignnone" size-large="" wp-image-11915\"="" src="\"http://www.mywebsite.com/wp-content/uploads/2016/01/popup-1024x662.jpg\"" alt="\"popup\"" width="\"1024\"" height="\"662\"">

Any ideas why the plugin does this now? Has the plugin been updated to reflect recent changes in how WP handles images?

Also when I save anything I get this error which may be unrelated but also appears in a green message bar which is strange for an error:
"Failure when receiving data from the peer"