For some reason CrewChief has lost the ability to add fuel on pit stops for GT races. I have become dependant on the app to add the fuel for me and the other day I pulled into the pits and used to black box to toggle over to fuel so that I could get the revs up to leave the pits when it finishes filling and the Fuel to add displayed 0. I had to quickly add the fuel calculation that I last heard the app mention to get it to fill. I have tried it in a few more races, even manually telling it pit stop add XX L of fuel but that doesn't seem to work either. Any help would be appreciated.