The booking app has no flights available after 7 Feb 2015 which is around the time SCOOT start operating the B787 on the route. It makes sense not to have two airlines with the same owners competing against each other. Now Jet* will have an A320 competing against a B787.
SCOOT have moved to the old Bangkok airport whilst Tiger remain at the new one, SCOOT fly to the Gold Cost whilst SQ fly to Brisbane.