Racelabs Fuel Calculator

Anyone else have or have had any issues with the Racelabs auto fueling? The sprint races at Fuji for me it has over fueled by 1.5 to 2 laps every race. In one instance costing me a podium. I’ve disabled the iRacing auto fuel and even zeroed out the fuel margin in the app.ini. I’m also running a 0.2 lap margin in the Racelabs settings and have even tried clearing the fuel cache. Is there something I’m missing or should I just go back to using iRacings auto fueling?