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The form on the webpage is this https://form.jotform.com/62453631997971.
The issue is that your iframe codes have the min-height attribute. You should make it height only or add height attribute. In this case, your form iframe should be the following:
<iframe id="JotFormIFrame" onload="window.parent.scrollTo(0,0)" allowtransparency="true" src="https://form.jotform.com/62453631997971" frameborder="0" style="width:100%; height:4500px; border:none;" scrolling="no"></iframe>
Please change that to fix it.