Problem intergrating Fancybox with Grid-a-licious

I’m in the middle of integrating fancybox with the wordpress theme Grid-a-licious

Currently hosting on my PC so I’m sure it will load as slow as crap but heres the link https://78.86.140.126/ (I hope my security is up to scratch)

Everything appears to work fine but there is a specific action, which breaks the functionality of grid-a-licious which is supposed to always align your divs into a set of columns.

First resize your browser window and you’ll see that the layout remains flexable. Now, click any of the images to initiate fancybox. The image zooms, and the content remains flexable.

Now, close that image, using the link to the top right of the image. This breaks the flexability of the content, the content now acts as now its fixed width.

This problem works the same across browsers so I think there might be a conflict between JS? There’s a lot to look through but I can’t seem to pinpoint the issue at the moment, so any help would be appreciated