background not showing when Wprocket enabled

When I have wprocket enabled the background of the Notification is not showing (everything else is showing but the background is transparant)

I have excluded the CSS files in Wprocket for both Minify and Optimize CSS delivery

/wp-content/plugins/woocommerce-notification/css/(.*).css

But still no luck.

When I disable WProcket, the background shows fine.

What do i need to change