Back button breaks in new line

I started using Ionic today. I compiled the default tabs app for android.

Unfortunately the back button breaks in new line on some displays, so it’s overlapping the content-view (i have no image, sorry):
Affected tested devices are the

  • Motorola Moto G (1280x720px), Cyanogenmod
  • OnePlus One (1920x1080px), Android KitKat

On my Nexus 5 (Android L) it looks correct.

Is this problem known?