Description
When using the keyboard to delete text in a text field, as each character is deleted the audible and haptic feedback provided to VoiceOver users is that which normally indicates that you have reached the start of the text field and that no further text is available to delete (or that you have reached a boundary when swiping to move VoiceOver focus through screen elements).
This behaviour does not appear to be present in all text fields. One example of where it is present is the address bar in Safari.