Hey Liz,
Thank you for reaching out to us! I’m very sorry about this issue you are experiencing, let me help you with the troubleshooting.
Can you please make sure that all of your plugins are up to date? Also, I would suggest you to use Chrome Developer Tools to spot any console errors in your site. Access the page where you are experiencing this issue (using Google Chrome) and press F12. After that click on the Console menu and send us a screenshot / let us know if you see any errors in there. You will find further information about Chrome Developer tools here.
If you see any errors in the console, I would suggest you to run a Conflicts Test by temporarily deactivating all of your plugins (except The Events Calendar) and changing your current active theme to another one like Twenty Seventeen and let us know if the issue persists after that.
I hope this helps! Let me know your test results and I’ll be happy to further investigate your case if necessary.
Regards,
Patricia