It is working fine on our test site.

Which page ID have you added there?

Please share me that page URL.

This can be due to plugin conflict on your site so please try temporary deactivating all plugins and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.

It would be very useful and easy to troubleshoot and fix the issue on your site if you share your site login details as requested previously.