Hey there,
Sorry you’ve run into some problems here, though I’m curious if you can clarify two things, for now:
1. “My websites are using Facebook to promote events” – how specifically is Facebook being used on your site to promote events? What specific Facebook tools are being employed?
2. “this problem does not happen with WooCommerce-only websites we’re running.” – would you be able to disable The Events Calendar on your current site and test it for a bit with your Facebook conversion tools, and see if the problems persist or not? I realize this may be a bit cumbersome to do, but it would be quite useful as each site can be different.
Thank you! 🙂
George