ios and ipad modal not scroll

Hello,
All devices apple when viewing the form in a modal window when you start to fill out the form scroll bars disappear. Called by the standard Joomla modal box.

<a href='http://site.com/index.php?option=com_chronoforms5&chronoform=formName&lang=en&tmpl=component' class='modal btn btn-primary btn-lg'  rel="{size: { x: 500, y: 600 }, handler:'iframe'}">formNameModalBox</a>

Screenshots with explanations below

Hi papagot,

It looks to me as though the modal box you have used is wide than the screen.

Bob

Yeah, but the problem is that the same android everything works well. The problem is not that the modal window is much broader but the fact that as soon as we click on ANY element in the form and DISAPPEARS scroll bar and the page scroll. if you do not click on the element scrol is vicinal and scrolling ok...

Hi papagot,

Sorry, No idea - I haven't seen this reported before. Please post a link to the form so I can take a quick look.

Bob