Norton toolbar disappears

Hi,

I have the latest version Norton 360 using IE11

Problem: The entire Norton toolbar (Icon Norton, Norton Safe Search, This page Is Secure, Access vault...) disappears form the screen when I connect to a  website which contains advertising content. It leaves a blank space. This lasts for as long as I takes for the website to fully download.  However, this does not happen on websites without advertising eg. a government site, Mayo Clinic, and Norton Community site etc.

This was not a problem with the previous  version of 360.

This does concern me!

 

Any ideas?