Hardware keyboard has unexpected layout

[ricocrescenzio95]

Describe the bug

When an hardware keyboard is connected (and the software one is hidden by the system), on iOS 13/15 there are
unexpected layout "jumps" of inputAccessoryView when switching between text fields with no keyboard and text fields with a custom inputView.
On iOS 14, the system call infinitely layoutSubviews leading to a frozen app.

To Reproduce

Steps to reproduce the behavior:

1. Create a bunch of SUITextField
2. Add custom inputView and inputAccessoryView to some of them
3. Switch between text fields4.

Using a simulator, you can easily simulate an hardware keyboard.

Expected behavior

• The inputAccessoryView layout shouldn't jump and should have correct height when switching between text fields.
• Also, on iOS 14, it shouldn't re-layout infinitely.

Screenshots

Registrazione.schermo.2022-04-15.alle.14.47.59.mov

Device

• Device: both physical and simulator.
• OS: [iOS 13.x-15.x jump / iOS 14.x loop]