After I have typed 2 or more lines on comment box, when the cursor is not on the first line, navigating the cursor using keys will bring the cursor to first line. This issue doesn't occur on Question or Answer box, only on comment box. This may be a minor bug, since user can reposition the cursor using touch screen, and not all input methods have navigation arrow.

* Stack Exchange: 1.0.12
* Android model: Nexus 4
* Android version: 4.4.2
* Keyboard: [Google Japanese Input](https://play.google.com/store/apps/details?id=com.google.android.inputmethod.japanese&hl=en)