Resolution
Sometimes there are circumstances where a list member will get deleted from a list after they have been sent a message.
If the member was deleted before they had a chance to click on the link, then the user will be taken to the correct destination but no tracking information will be recorded.
If the member was deleted after they had clicked on the link, then the user will be redirected to the correct location and the click will be recorded. You will not be able to see who clicked on the link in this case.
