NumberOfVisitsCriterion cookie never expires

NumberOfVisitsCriterion cookie never expires and is set to a date like December 9999.

The date for when the NumberOfVisitsCriterion cookie should be expired is set in the Episerver assemblies.

Some options around it:

1. Create a duplicate of the Number of Visits visitor group (inherits NumberOfVisitsCriterion) which drops the cookie. Ensure this sets an appropriate expiry date.

2. Use some javascript on the page to modify the cookie, after its been delivered.

3. If none of the above works we may need to work with Cloud Flare.