Defender scan timing out

Hello,
The Defender scan continues to time out even after I've added the following to the theme's function.php file:

/** Fixes WPMU Defender scan resource limit error */
add_filter( 'wd_limit_cpu', 'wd_limit_cpu' );
function wd_limit_cpu() {
	return 9;
}

I have granted support access.

Thanks!