Creator removing "/" from URL

Creator removing "/" from URL

Hi, 
we are using a Creator contact form extensively through out our web site.

Example: http://2base.com/en/contact/

The contact form is catching the URL of the site where the form is used. (This is hidden for the users).
But for some reason it also removes one of the "/" in http://....

So for the above mentioned site the URL shows as http:/2base.com/en/contact

This causes problems in CRM, since Zoho CRM does not recognize http:/ as an valid URL, but only http://

Why is one of the "/" being removed in http:// ?

Kind regards,
Bo Thygesen