Keyboard blacks out and hamburger button switches side
This is the first time it's happened to me.
I don't need to talk about it a lot, because the video speaks for itself.
Android bug report: https://drive.google.com/open?id=0B6JvEuk7Tm_aY0tFYXVOQjZSVkk
Device: Nexus 5
OS: Android 6.0.1, M4B30Z
Swiftkey version: 126.96.36.199