Randomize order

Is it possible to order posts randomly so that at every page load the posts are in a different order?

I’ve tried orderby="random" but I can’t achieve the effect.

The full shortcode I’m using is this:

[ajax_load_more post_type="page" orderby="random" post_format="standard" posts_per_page="7" max_pages="0" transition="fade" button_label="More" exclude="30,35"]

Thank you.

https://www.ads-software.com/plugins/ajax-load-more/