When an class has an __invoke() magic method that returns an object instance, the returned object is code completed only when explicitly calling $obj->__invoke() and not when implicitly calling via $obj(). Consider the following code:

class Foo
{
	public function someMethod() {}
	public function otherMethod() {}
}

class Bar
{
	public function __invoke()
	{
		return new Foo();
	}
}

$bar = new Bar();

$foo1 = $bar->__invoke();
$foo1-> // this completes correctly, offering someMethod() and otherMethod()

$foo2 = $bar();
$foo2-> // this does not complete