777 Tutorial - Fuel consumption issue

Hi,

I have started following the tutorial of the 777 and are now having a fuel issue with it. At the top of climb i had still expected 7200kg of fuel at OMDB, but not even halfway of the flight this dropped to only 500kg expected.

I added 7000kg of fuel (should not be done, but I want to complete the flight), and it was briefly on expected 7000kg at destination, but now a few minutes later it is again 5000kg.

Things that I have checked:

- Flaps up

- Gear up

- Speedbrake not armed

- N1 setting and temperature set correctly

- No fuel dump active

- Static weather theme without winds enabled

Anyone has a clue what can cause this issue?

Thanks.