::class docs says it resolves to fully qualified namespace but actually only qualified namespace

From manual page: https://php.net/language.oop5.constants it says...

The special ::class constant allows for fully qualified class name resolution at compile time, this is useful for namespaced classes:

With https://www.php.net/manual/en/language.namespaces.rules.php saying that a fully qualified namespace is...

an identifier with a namespace separator that begins with a namespace separator, such as \Foo\Bar. The namespace \Foo is also a fully qualified name

However using ::class on a namespaced class doesn't include the initial namespace separator in its output.

[root@TPS-NUCI5-DEMO1 ~]# php -a
Interactive shell

php > require_once("vendor/autoload.php");
php > var_dump(\Twig\Loader\FilesystemLoader::class);
php shell code:1:
string(28) "Twig\Loader\FilesystemLoader"

Either ::class is behaving wrong or the documentation shouldn't say it resolves to a fully qualified class name.

Start with the class constants page at language.oop5.constants and compare its wording with the namespace naming rules page at language.namespaces.rules.php. Confirm the documented ::class output for namespaced classes, then clarify the terminology so the statement matches the behavior and the namespace definition.