I wasn't able to reproduce this issue with the airlines app
on our side. However, this behavior i sprobably caused by an error coming up which disables the app from further loading and it might be caused by not properly synced files. Can you please describe the changes you apply in your app before triggering a livesync.
Also, can you test this behavior with other apps to make sure it is not application-specific. It would greatly help if you can test it with any of our sample apps as this way we will be able to try and reproduce it locally as well.