Gravity Forms and Flexslider

Hello,

It looks like there's a conflict between Gravity Forms and Flexslider, for each time I try to minify the latter using W3TC, my form disappears.

I noticed that when Minify is disabled, the form works and the wrapping div is as follow:

<div class="gf_browser_chrome gform_wrapper" id="gform_wrapper_1" style="">

But when I turn the Minify feature on, the form div becomes:

<div class="gf_browser_chrome gform_wrapper" id="gform_wrapper_1" style="display:none">

Any suggestion on how to solve this?

Thanks in advance.

Here you go:

http://www.evolab.fr/enquete

As of now Flexslider is not minified. I'll do it if you want me to.

Thanks in advance.