WordPress Orderby rand not working

If you’re working with the orderby parameter in get_posts/WP_Query to ‘rand’ beware of this report:

“I was developing a site on WP Engine. They actually disable the Orderby Rand Function. If you happen to be using WP Engine, in the dashboard area they put in the WP Admin go there scroll down and make sure the Orderby Rand function is not disabled. You would not believe what I went through before I deduced that it was the host causing the problem.”