Steps to reproduce the issue

When you open some view in administration which is based on JViewLegacy (external component views), it does not load data from model

Expected result

Data from model are loaded.

Actual result

Joomla! 4.0.0-alpha6 - everything works as expected.
Joomla! 4.0.0-alpha7-dev - data are not loaded.

You can test it with some external component view or build your own:

jimport( 'joomla.application.component.view' );

class SomeView extends JViewLegacy
{
	protected $state;

	function display($tpl = null) {

		$this->state		= $this->get('State');
		dump($this->state);
	}
}

produces in Alpha6

but in Alpha7 (latest build created by composer/npm):

Data from model are not loaded at all

System information (as much as possible)

Joomla! 4.0.0-alpha6 - works OK ✔️
Joomla! 4.0.0-alpha7-dev (latest build created by composer/npm) - data are not loaded. ?