A previous joystick I had, had a tiny left turn while flying after a year of use or so. In the Fdev flight control setting for that joystick axis I increased the dead zone to cover the tiny turn left. You could try that. It was a couple years ago, and I am now using a different joystick which has not needed that 'fix'. So I do not remember the exact location or setting name but it is in the ED controls for flight.