Anything - ANYTHING - that causes the ticket to be reissued will cause you to be re-waitlisted with your then-current status. Causes of ticket reissue could include:

- schedule change and/or flight renumbering, including partner changes
- requesting a fare guarantee refund
- voluntary flight changes, including adding/deleting a segment
- any other changes, voluntary or involuntary, that result in a new eticket number