I narrowed this crash in a production iOS app down to this library. I believe it has to do with the implementation of Input instead of using a TextInput though I'm not 100% sure about that.
You can find the whole, ongoing thread of this error at RN Issue #10635. Many of the cases have to do with Touchable variety buttons not wrapping children in a View.
Update:
I can confirm that this is the case for iOS and Android -
"react": "16.0.0-alpha.12"
"react-native": "0.47.2"
"react-native-autofocus": "0.0.6"