Hi. Thanks for your question and sorry you’re experiencing this.
I tested it on my iMac and experienced the same in Chrome and Safari.
I didn’t see any Console errors in Chrome.
Please follow our Testing for Conflicts Guide and see if that helps narrow down the cause of this.
I would also suggest enabling WP_DEBUG and sharing any PHP errors you see while navigating your site’s home page, events page, single-event pages, and any other of your site’s pages relevant to this ticket.
If the conflict turns out to be with your custom theme and WP_DEBUG doesn’t reveal the issue, you may want to reference https://codex.wordpress.org/AJAX_in_Plugins to see if it can help identify anything else.
Please let us know what you find out.
Thanks.