Sticky Sidebar Widget

Hi guys,

I just installed a sticky sidebar widget called “Q2W3 Fixed Widget”, because I need to have a lead magnet following the sidebar as you scroll the blogpost, to increase my list.

On Firefox it seems to work properly, whereas on Chrome and Safari, it tends to disappear as you scroll down the page. You can view a sample here:

http://vacationrentalsecrets.com/disrupting-an-industry-thats-not-going-where-its-base-want/

Could you help me out to fix this, so it behaves correctly? Maybe there is some css that I need to insert in the quick CSS?

My admin credentials for you are in the private area.

Thank you so much!

Antonio