iOS 14.2 beta: keyboardWillHideNotification not called anymore

Number:rdar://FB8832021 Date Originated:
Status:Open Resolved:
Product: Product Version:
Classification: Reproducible:
When the keyboard disappears, `keyboardWillHideNotification` should always be fired. With the new iOS 14.2 beta, this is not always the case.

To reproduce:
- Have a UIViewController that can become first responder (with a custom view)
- Add a UITextView as a subview of this view controller, and put the focus in it
- Call `resignFirstResponder()` on this text view
- The keyboard will disappear and the view controller will then become first responder

Expected result:
`keyboardWillHideNotification` should be fired.

Observed result:
`keyboardWillHideNotification` is not fired, even though the keyboard disappeared.


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