Unused property hint shown when used to instantiate an anonymous class

<?php declare(strict_types = 1);

namespace Cz\Test\UsedProperty;

class Factory1
{
    public function __construct(private bool $anyParameter)
    {
    }

    public function create(): Interface1
    {
        return new class ($this->anyParameter) implements Interface1
        {
            public function __construct(private bool $parameter1)
            {
            }

            public function getSomeParameter(): bool
            {
                return $this->parameter1;
            }
        };
    }
}


interface Interface1
{
    function getSomeParameter(): bool;
}