Adding Custom Code does not show on page

If you add a js script to custom code and add a form code on iframe after that on a custom code block it does not show the form. On earlier Bootstrap Studio version it worked.

<script src="URL HERE"></script>

<script> iframe parameters here (IFRAME tag to DOM) </script>

We tightened up the security of iframes in Bootstrap Studio 5 so this might be what's causing your issue. Does the iframe work when exporting and previewing in the browser?