Embedded form does not show correctly sometimes

Hello,

sometimes when I open my site where my form is located,  it shows entire form, does not hide fields. Most of the times it shows ok but how can I fix this.

My site 

http://www.radio-code.rs/#!becker/c1x67

http://www.radio-code.rs/#!ford/c20by

Username  radiocoders

thanks for your help!

Youe site is the best thing ever.

Thank you for contacting us.

We would like to recommend you to try a form iFrame code on your website.

Getting the Form iFrame Code

It should help if there are any script conflicts or processing issues.

Please give it a try and let us know if you need any further assistance.