WP embeds wp-embed-aspect class doubled bug

When I use wordpress embed (Youtube) on a custom post type the aspect ratio class (wp-embed-aspect) is applied incorrectly.

Let’s say I have a 16:9 video: https://www.youtube.com/watch?v=peHVRC07b5U

If I embed it on the default post type, the aspect ratio is recognized correctly, and a class of ” wp-embed-aspect-16-9 ” is applied.

If I embed the same video on a custom post type, wordpress applies a wrong class: ” wp-embed-aspect-4-3 ”.

Why is that?

Also I was looking through the plugin that creates the custom post type, and the only code that was doing anything with embeds was this:

if ( ! function_exists( 'llms_content' ) ) {
	function llms_content( $content = '' ) {
		$content = do_shortcode( shortcode_unautop( wpautop( convert_chars( wptexturize( $content ) ) ) ) );
		global $wp_embed;
		if ( $wp_embed && method_exists( $wp_embed, 'autoembed' ) ) {
			$content = $wp_embed->autoembed( $content );
		}
		return $content;
	}
}

I don’t entirely understand what this does, maybe I should spend more time analyzing this, but maybe someone else will know faster?

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