Hi Umberto,
I have a similar issue.
Aircraft PMDG 777-300 ER, I start with 55,000 lbs fuel on board.
In GSX settings, I have always progressive ticked, and multiple trips off.
I request for fuel truck and it arrives and I am asked to use the air crafts fueling system.
I go into FMC and change fuel to 142,660 lbs. And the truck starts refuelling.
I get the green bar on the top stating 10000lbs fuel, and just keeps repeating and does not end.
I had minimum refuel time set to 300 sec in the configuration.
Even after 15 mins, the bar just keeps flashing 66000 gallons / 100000 lbs. It does not go above 100000 lbs ...
The refuelling completed message does not appear, what am I doing wrong.
I have to reset position and then continue with boarding etc.
The scenery is default WSSS and gate D34.
Thanks