I will look into it. On your end, could you please check that your gateway is configured to forward to the correct address?
Assuming you use the Semtech UDP packet forwarder, these are the addresses:
router.au.thethings.network # Australia 915-928 MHz
router.as.thethings.network # Southeast Asia 923 MHz
router.as1.thethings.network # Southeast Asia 920-923 MHz
router.as2.thethings.network # Southeast Asia 923-925 MHz
It is not possible yet to move applications between two handlers, but this is on our TODO list.