Anyone know why waitlists expire so fast? I had waitlists for flights EU-BKK and they expired today so I rebooked them and it says they will expire tomorrow (flying 28th or 29th this month) assume it is because I am close in, but does that mean no more waitlisting after 25th or will I just have to repeat the process every day?

Seems to be the HKG-BKK which is messing up my flights since there is only tailored availability on those legs 29th and 30th for some reason (big event?). Seems CX uses married segment logic too. Not got my hopes up too much.