Air Asia X have not had a happy time with OOL ops, two incidents of flying below LSALT and now this.
FR24 makes for interesting playback viewing
https://www.flightradar24.com/2016-0...JST630/a683fd4
Have not listened to the audio, if Air Asia and Jetstar were at assigned altitudes of 4000 and 5000 respectively then I don't see a problem, vertical separation exists and it's also outside of the traffic advisory threshold for TCAS, let alone the resolution advisory threshold.