Prefer Large Titles and RefreshControl not working well

I am using this tutorial to implement a pull-to-refresh behavior with the RefreshControl. I am using a Navigation Bar. When using normal titles everything works good. But, when using "Prefer big titles" it doesn't work correctly as you can see in the following videos. Anyone knows why? The only change between videos is the storyboard check on "Prefer Large Titles".

At the end what worked for me was:

• In order to fix the RefreshControl progress bar disappearing bug with large titles:

  self.extendedLayoutIncludesOpaqueBars = true
  

• In order to fix the list offset after refreshcontrol.endRefreshing():

  let top = self.tableView.adjustedContentInset.top
  let y = self.refreshControl!.frame.maxY + top
  self.tableView.setContentOffset(CGPoint(x: 0, y: -y), animated:true)