Ornis
The engines may have stopped due to fuel exhaustion. Fuel exhaustion implies no fuel in the supply tanks.
How might that arise?
For starters, your third word is 'may'.
Both engines wouldn't have failed at the same time.
Fuel exhaustion means no fuel getting to the engines.
If you are trying to link this with the fuel indication incident, you've taken the wrong route, as hidden in the detail is the warning going off early, the fuel not actually being low and at no time were there any empty tanks.
Anyone else feel this is going round and round and round and round and round and round and round and round and round and round and round and round and round and round and round and round and round and round and .....