There should be two hour or longer voice recorders on every flight.
This flight apparently only had the 30 minute one.
The pilots got lucky as the time from waking up to the gate likely took up all of the 30 minutes as the snoring was written over.
Still doesn’t explain the three flight attendants not sending up a red flag much earlier. If they were all in the cockpit, we can pretty much rule out “sleeping” as what the merry fivesome was engaged in. And if they were out in the cabin where they belong, I’m sure some passengers would have noticed them all sleeping. Something odd was going here, because it sounds like the entire crew of 5 was completely unaware of what was going on with the flight.