Moto voice not sending some commands under locked screen on lollipop topic

Hi, i just want to know from you that are using lollipop already ( mine is .17) if you are with this weird problem.
Some commands under locked screen like l "send whatsapp" or " post facebook" are not working for me. Others work perfectly like "take selfie or photo", " call someone" etc.
I dont have password, pin or any APP that could cause it.
I tried full wipe, reinstall only whatsapp for testing but it stay the same.

Can i get some help here? Some feedback...