Issues with the background

Hi, we are running Newsmag in this site:
https://www.s1ngular.com/coqueteria-todo-esta-en-las-senales/
We are experiencing some issues with the background. But this bug does not happen in Home page. We do not have the “background click ad” activated, we just need the background image.
Apparently, when you are a recurrent user (this bug doesn’t happen the first time you enter the site, but in the second or third time) when you scroll down, the background stops being in fixed attachment, and seems to be in “scroll attachment”, so a white solid background replaces the background image; if you continue scrolling, the background appears again, but sometimes the left side offsets the right side, and the background continues being in scroll attachment.

https://s3.amazonaws.com/prod_object_assets/assets/41193543267638/background-glitch-1.jpg?AWSAccessKeyId=AKIAI7NUHQYARXR2GGCQ&Expires=1436814180&Signature=kOWdgqfOQOzt7RM7ZSAGFtquXEw%3D#_=_

https://s3.amazonaws.com/prod_object_assets/assets/41193543267636/background-glitch-2.jpg?AWSAccessKeyId=AKIAI7NUHQYARXR2GGCQ&Expires=1436814176&Signature=NQGXci0dk0eMu5%2Byu%2Fay3f5oniU%3D#_=_

Hi

Try to deactivate all plugins except Visual Composer and test the site again. Also I found a lot of warnings about content in console: http://screencast.com/t/4MjguRc78 http://screencast.com/t/shcDPpRYL They appear because the server load the page over HTTPS and the images are loaded over HTTP. Try to fix this errors by loading the images over HTTPS to, because it may affect the site functionality.

Thanks!