PHP Class: method search stopped working

[ok-ttc]

Hello,

I came here in desperation. :-) Up to recently I was able to search methods in a Class file structured like this:

<?php

namespace App\Data;

use Symfony\Component\HttpFoundation\RequestStack;
use App\Controller\PrivateController;

class Cron extends PrivateController
{
	private $requestStack;

	public function __construct(RequestStack $requestStack)
	{
		$this->requestStack = $requestStack;
		$this->session = $this->requestStack->getSession();
	}

	public function method_1() {
             # some code
	}

	public function method_2() {
             # some code
	}

	public function method_3() {
             # some code
	}
}

For some reason the extension now only shows me "No symbols found". In the past it would show me something like

method_1
method_2
method_3

Did I break something or can I change something to make this work again?

Thank you for your help. :-)

[ok-ttc]

For some reason I just noticed that with the extension PHP Intelephense enables, it works as desired.