Background image resizes when keyboard opens

As what the title says, the background image resizes when the keyboard opens. I’ve set the background to .pane/ion-pane. Using remote debugging with Chrome’s Developer Tools, the ion-pane resizes when the keyboard’s visibility is shown.

I’ve uploaded the code base in my GitHub account. It is basically just the blank starter app with the background image applied. I’ve only tested it on Lollipop on my Nexus 5. I am using the latest ionic (beta 14) and latest cordova (4.1.2).

Thank you for any help, in advance.