Please fix those issues:

the volume up-down button (the processing not the real buttons) sticks and need to press the power button and then again the volume button to achieve the proces.

The same is happening when listen to music or  watch videos on YouTube and the app crashing.

And last but not least(currently), on Google Chrome when I go back to pages(several times),the button sticks like it is pushed and the only thing i can do is to push the center button to go to the start and open again the browser...