Well... if you click on the link it says
The flight crew reported that an automated flight system issue had occurred, and elected to return to Perth,”
Do I need to add a 'rolls eyes' emoticon?
Or mention that it was perhaps the Thronomister?
Or berate the standard of journalists reporting on such a trivial matter?
Or tell everyone to perhaps "Wait for the report"
...and then sarcastically whinge that it will take three years for it to come out.
But it's OK to speculate because that's what us professionals does!
(So, anyone have any idea what happened?)