Pour RF2 :
In your player.json file look for the line below and change (mine is on 4 );
"Repeat Shifts":4,
"Repeat Shifts#":"0 = no repeat shift detection, 1 = detect and eliminate accidental repeat shifts within 100ms, 2 = 150ms, 3 = 200ms, 4 = 250ms, 5 = prevent shifting again before previous shift is completed"