Button next to an input half shown on a device

You can check the code here: http://codepen.io/mhartington/pen/oBwln

But you have to test it on a device.

When the device is in portrait orientation, the button is half-shown.
The right half part of the button is out of view.
While in landscape orientation, everything is fine.

The problem remains there, even after I installed the keyborad plugin.
I am using ionic 1.0.0 beta 5.
My android device: 4.0.4
The meta tag: <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">