The last argument of the method is not highlighted

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class Foo
{
    // 'DateTime' is not highlighting
    public function test(DateTime $a): array
    {
        return [$a];
    }
}

(php-mode-version)
"PHP Mode v1.24.3-non-vcs"

(emacs-version)
"GNU Emacs 30.0.50 (build 1, x86_64-apple-darwin22.4.0, NS appkit-2299.50 Version 13.3.1 (Build 22E261))
 of 2023-04-26"