Scoreboard, distance crouched doesnt work

Dear, Mojang
      I found a bug which bothers me, and it is the scoreboard stats (ex:stat.crouchOneCm and stat.sneakTime) doesnt work, for ex: i was trying to crouch walk for a long distance  and the scoreboard doesnt seem to update, and also the command "/testfor @a[scores=

{Sneak_min=1}

]" also doesnt work. I am hoping for the next update to fix this. Device info; Android CKK Elite 5.

      -cj