Latest Android M preview Google now nav ring

Does anyone know if Google just completely axed the Google now swipe up nav ring thing? I really miss this functionality and seems like now all I can do is old home button down to access now on tap, then hit the Google now button to get into now app.

Telephone ring => unable to answer => ring looped

Hello, from time to time, when I have a call, the phone got stuck in a loop and I can't answer or even open the phone to answer (I have the flip cover and the latest stock). Does this happened to you ? that's the second time I have that trouble =T