The edit form missing scroll bar when form is longer than the page

It seems like that missing scroll is bootstrap theme specific.

Here’s a quick fix (CSS) that forces the scroll to show when modal goes outside of the current view. e modal goes outside of the current view. 
.modal.ui-jqgrid-bootstrap.ui-jqdialog {
  overflow: auto;
}

A permanent fix will be added to the release update.

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