Delete Auth0 cookie on signout

Just upgraded our Applications to use Auth 9 and Lock 11. We were having some browser issues with third party cookies so we also added a fallback page as needed.
On the Safari browser, when I log in, log out and then try to log in it fails with this error “Unknown or invalid login ticket.”. I am only able to login when I delete the cookie Auth0.com set. Is there a way I can delete this cookie on sign out? Please advice

As it has been more than a few months since this topic was opened, and there has been no reply or further information provided as to the existence of the issue, we are closing this topic. Please don’t hesitate to create a new topic if this issue is still present, we would be happy to work with you to help find a resolution.