Reduced fuel asymmetry
@falcon900
It has been mentioned in this thread that the aircraft flies left side low in the cruise.
Given the now reported fuel tank geometry it would appear that this could only increase the fuel asymmetry.
On the other hand, never having looked into an open bucket of fuel in flight, it does seem quite possible that a few litres could have slopped from one supply tank to the other just as the levels began to fall in a manner that reduced the fuel asymmetry from the designed ~5 litres. Within a few minutes the levels would have fallen and prevented any further slopping.