When adding a tableview header in storyboard, by dragging a view onto the header area, subviews inside this header view seem to be visually misplaced. Is there a logical reason for this?

Reproducing the problem (Xcode 8):

1. Open storyboard
2. Drag a UITableViewController onto the canvas
3. Drag a UIView onto the tableview header area

[![TableViewHeader in storyboard](https://i.stack.imgur.com/moaYS.png)](https://i.stack.imgur.com/moaYS.png)

4. Add any view as a subview on the header view:

[![This view should be placed at the top of the header view](https://i.stack.imgur.com/J8pFL.png)](https://i.stack.imgur.com/J8pFL.png)

This issue is only visible in storyboard though. At runtime, the views are aligned as expected.