iOS: Pressing and holding backspace on a TextInput can leave undeleteable leftover letter

Reproduce:

• Have a TextInput
• Enter something like: "http://www.apple.com/something/blabla"
• Your cursor is at the very right
• Now hold the backspace VKB key
• Cursor deletes characters and goes all the way to the left
• BUG: One letter will keep in the TextInput, usually 'p' or 'a'. This letter cannot be removed as (whatever I do) the cursor stays on the left and pushes the letter to the right.

Richard Moe Gustavsen mentioned this could be releated to https://codereview.qt-project.org/#change,77033