Create View Subpanel

Hello,

I am just wondering if something has changed with how to add a subpanel to a Create view. We have something very similar to the post below in place, and we are finding the page scrolling is broken with a recent upgrade. We are struggling to find a root cause, but I'm hoping someone here has an idea, or could point me in the right direction of what may have changed.

sugarclub.sugarcrm.com/.../subpanel-to-be-editable-before-create-a-record-like-opportunity-revenue-line-items

Thank you!

Chris