Did they ever discover the cause?
There were reports of possible arson.
Sabotage - my bet.
China scratched one US Flattop — “Just an accident—Like at Russian Carrier.
The article says it's still under investigation.
Did it have a light metal superstructure? High temperature light metal conflagrations can be impossible to extinguish in certain circumstances. Sit back and watch it burn until the fire runs out of fuel.
I heard one news story that said the cause was arson, but I don’t think they caught the arsonist.