Pluging Blocking Filterable Portfolio

Please could someone with a bit of a strange one. On the following website and page - http://www.alexandra-g.com/art-portfolio/

I have a portfolio which when you hover over an image the description comes up on the side bar you can filter on image category.

When I active social media both of these functions are blocked and don't work.

Any ideas on how to find what is causing this? Or even better a solution to it?

Many Many thanks in advance for your support