you cannot sprint while blind

while i was testing a part in my new adventure map, i was testing one of the jump's when i realised you cant run while blind, i dont own any recording software so sadly i cant slow you but if you want to test it then give your self blindness and hold both forward and control and you will still walk. i know my previouse bug report's were 'false i was just figuring out command blocks but this one i have actually doble checked so i wouldnt mess up again. hope this can be fixed because my map will probably need to be changed entirly. and i've been up all night building that section.