Creation of dynamic property is deprecated !

Description

The following code ( This should never happen when I'm using magic methods, but unfortunately it does happen sometimes ):

<?php
final class Content {
	protected array $data = array('sequence'=>1);

	public function &__get(string $property) : mixed {
		if(isset($this->data[$property]) === false):
			$this->data[$property] = null;
		endif;
		return $this->data[$property];
	}
	public function __set(string $name,mixed $value) : void {
		$this->data[$name] = $value;
	}
}

$content = new Content();
$result = $content->sequence * 2 + 1;
$content->sequence += 1;
print $result;

Result:

3

But sometimes when the number of such requests increases, I receive the following warning :

Creation of dynamic property Content::$sequence is deprecated 18

PHP Version

PHP 8.2.11

Operating System

Linux

Start by running the PHP 8.2.11 reproduction from the issue on Linux and compare the magic-method accesses with the reported dynamic-property warning. Trace the runtime handling of __get, __set, and compound assignment to determine where the warning originates. Done should include a confirmed explanation and a regression test or clearly defined behavior change.