KeyboardAvoidingView has no effect on multiline TextInput

KeyboardAvoidingView only works with single-line TextInputs. When the multiline prop is set, KeyboardAvoidingView does not shift the TextInput at all.

Is this a bug report?

Yes

Have you read the Contributing Guidelines?

Yes

Environment

Environment:
OS: macOS Sierra 10.12.6
Node: 7.0.0
npm: 3.10.8
Watchman: 4.7.0
Xcode: 9.1

Packages: (wanted => installed)
react-native: 0.49.3
react: 16.0.0-beta.5

Target Platform: iOS (10.3)

Steps to Reproduce

1. Use a <TextInput> component with multiline prop set.
2. Wrap this in a ScrollView
3. Wrap that in a KeyboardAvoidingView.

Expected Behavior

Multiline TextInput should scroll above the soft keyboard.

Actual Behavior

Soft keyboard covers multiline TextInput.

Reproducible Demo

import React, { Component } from 'react';
import { Text, TextInput, View, ScrollView, KeyboardAvoidingView, Keyboard} from 'react-native';

...

	render() {
		return (
			<KeyboardAvoidingView style={{flex:1}} behavior="padding" keyboardVerticalOffset={64}>
				<ScrollView keyboardShouldPersistTaps={'handled'}>
					<View style={{padding: 12}}>
						// various content to fill the page
						<Text style={{fontSize: 20, padding: 40}}>MESSAGE 1</Text>
						<Text style={{fontSize: 20, padding: 40}}>MESSAGE 2</Text>
						<Text style={{fontSize: 20, padding: 40}}>MESSAGE 3</Text>
						<Text style={{fontSize: 20, padding: 40}}>MESSAGE 4</Text>
						<Text style={{fontSize: 20, padding: 40}}>MESSAGE 5</Text>
						<Text style={{fontSize: 20, padding: 40}}>MESSAGE 6</Text>
						<Text style={{fontSize: 20, padding: 40}}>MESSAGE 7</Text>
						<Text style={{fontSize: 20, padding: 40}}>MESSAGE 8</Text>
						<Text style={{fontSize: 20, padding: 40}}>MESSAGE 9</Text>
						<Text style={{fontSize: 20, padding: 40}}>MESSAGE 10</Text>
					</View>
					<TextInput
						style={{padding: 4}}
						multiline={true}
						placeholder={'Type something here...'}
						onChangeText={this.updateMessage}
						value={this.state.message}
					/>
				</ScrollView>
			</KeyboardAvoidingView>
		);
	}

Beginne damit, die bereitgestellte iOS-Reproduktion mit KeyboardAvoidingView, ScrollView und einem mehrzeiligen TextInput auszuführen, und verfolge anschließend das relevante Verhalten von React Native bei der Tastaturvermeidung und der Texteingabe. Erledigt ist die Aufgabe, wenn das mehrzeilige Eingabefeld in der gemeldeten Anordnung über die Bildschirmtastatur gescrollt wird, ohne den einzeiligen Fall zu beeinträchtigen.