Firebug: when resizing the form, it dissappears

I just check the code via Firebug and when I resize the screen to the break point where the form display issue is the form code just disappears, its the in the bigger screen but then gone. If I drag it bigger agin and refresh it comes back. Here is a link to it http://gotwake.constantcontrol.net/book.html please can someone get back to me on this?

Hello,

First of all, I want to inform you about that: We have removed "Make this form responsive" checkbox from the Advanced Designer. All forms you have created are mobile responsive without selecting it.

I have checked your website and your form embedded in it. I couldn't see any issue with the form responsiveness.

Could you please elaborate the issue further?

Thanks in advance.