My Thrustmaster paddle shifters are a bit worn out, but BeamNG is the only game in my case where the input registers twice when downshifting compared to all other racing games (Assetto Corsa, ETS2, Wreckfest, AMS2 etc.). Other sims have longer shift debouncing values - where the game ignores any shift inputs within X milliseconds of the first input - to correct double shifting. Please, add shift debouncing settings!