Hi there Jon,
Thanks for getting in touch with us!
I just did a quick test in my local install and could see this working as expected. You need to add the ticket, then ‘edit it in WooCommerce’ just like you would do with a regular product, and add a featured image to it. Once that’s in place then the pic should show in the cart as it does for other products.
Can you please follow the steps described in our Testing for conflicts guide? This way we can see if this is a problem in our plugin or a conflict with the theme or other installed plugins. Also, it would be great if you could share your system information with me so I can check if everything looks right on that end.
Please let me know about it,
Best,
Nico