The last couple of times I have flown I noticed that even though LEDs and App are showing that I am in GPS mode and I am connected to 8 or 9 sattelites that I am getting some drift when sticks are at center. It will go forward steadily and drifts within a 10 or so foot radius. I did an IMU calibration and everything fell within the recommended limits. When I land I have to steady it or it will come in too fast. I have to pull back on the stick and land it quickly or it will start going forward again.