CodeIgniter4: Bug: classes overwrites parameter defaults, phpDoc's defined in interfaces

Please fix difference(phpDoc, parameter defaults) between classes and their interfaces.

For example: in system/View/RendererInterface.php $saveData = false:

interface RendererInterface {
public function render(string $view, array $options = null, bool $saveData = false): string;
public function renderString(string $view, array $options = null, bool $saveData = false): string;
}

in system/View/View.php $saveData = null:

class View implements RendererInterface {
public function render(string $view, array $options = null, bool $saveData = null): string
public function renderString(string $view, array $options = null, bool $saveData = null): string
}