Yeah China - I had to leave after pitting for the Mediums, and 3 laps later it automatically pitted the driver - and there was no need - had fuel to the end.
Then I wasn't there for the whole race last night in Europe - and both drivers pitted 2 laps early - they should have had the fuel (probably running on in pits) for 2 more laps on both stints which should have been enough to complete the race distance - even so - they are stopping at least 1 clear lap too early.
I'm in same league and had same issue in yesterday's race so European race. My drivers had 3.7 l and 3.4 l and per lap they were using 2.3 l so could easily have done an extra lap which is the number I set for my strategy for 1st stint but both drivers pitted 1 lap early. They were meant to do 5 lap and 6 lap 1st stints but instead did 4 lap and 5 lap 1st stint. I was live in race unlike Charlie.
Same thing happened again today in the Belgian race to both my drivers. Fuel usage per lap was 3 litres per lap in stint 1 but both drivers pitted when they had 4.6 litres still left and pitted a lap early compared to the strategy I had set.