I have custom event tracking set up in Google Analytics that tracks when a visitor registers on the site. The tracking is working fine. However, GA is showing that 100% of users "exit" the site after registering. They aren't exiting however, they are just getting logged in.

Is there some reason why a user creating a session by logging in would cause GA to lose track of the visitor and think a new user had arrived? Is there any way to prevent this?