Hi Mark,
Thanks again for reaching out to us 🙂
I had a look at your website and I can see some JavaScripts errors in the console, which might block the tooltip.
It might be due to the security plugins you’re using. Could you try to deactivate All In One WP Security and Wordfence Security, to see if that makes a difference?
If not, you might have to run some proper tests to find where the conflict comes from. I would recommend you to save your databse and php files before running those tests.
Cheers,
Jeremy