Open Group Invite Applies to Logged-In User who may not be the Invitee

1. Go to any Open Group that you are a member. I am not providing a link as you need to set this up yourself using valid groups and emails.
2. Invite a Curriki Member to join the group (person 1)
3. Log Out
4. Log In as a member who is NOT a member of the above group and is NOT person 1. We'll call this person 2
5. Go to the email of person 1
6. Click on the invite link, e.g., http://current.dev.curriki.org/xwiki/bin/view/Group_Congrats/JoinGroup?code=&user=XWiki.Person1

Bug
Person 2 was logged in at the time and is now part of the group, when the email link clearly has Person 1 in the link.

Should there be some numbers after "code="

NOTE: This issue happens on Open Groups. The check is working correctly for Closed Groups.