[iOS15.0.0] UIRefreshControl jumps content-offset when it starts refreshing in UIScrollView

From iOS 15.0, UIRefreshControl works weird when it starts refreshing.

This component provides refreshing content interaction by pulling down in scrollable view (e.g. UICollectionView, UITableView, UIScrollView)

However, at the time to start refreshing, the content offset of the scroll view jumps a bit. It never happens prior to iOS15.

I created a project that reproduces. https://github.com/muukii/iOS15-UIRefreshControl-issue-reproduction