iOS 13.4 Crash on launching UBSignatureDrawingViewController

iOS 13.4 Crash on launching UBSignatureDrawingViewController, it was working fine till upgrading to the latest 13.4.x version.
This is what I see in the stack trace,
```
Fatal Exception: NSInvalidArgumentException
index out of bounds for arranged subview: index = 7 expected to be less than or equal to 6
-[NSCache init]
```

`UIKitCore -[UIStackView insertArrangedSubview:atIndex:]`

