react-native-paper: TextInput outlined mode: label has unknown shadow

Current behaviour

Please see attached:

Expected behaviour

There should not be any weird shadow.

Code sample

Here’s what I’m using to render this input field:

<TextInput
	label='Name'
	testID="input"
	mode="outlined"
	theme={{ colors: { placeholder: 'grey', background: '#f5f6f5', text: 'grey', primary: '#5d5d5d' }}}
	style={styles.input}
	value={ this.state.name === undefined ? name : this.state.name }
	onChangeText={name => this.setState({ name })}
/>

and here’s the parent config:

const theme = {
	...DefaultTheme,
	colors: {
		...DefaultTheme.colors,
		text: '#565656',
		disabled: '#ffffff',
		primary: '#3f51b5'
	},
	fonts: {
		regular: "AirbnbCereal"+fontSuffix+"-Book",
		medium: "AirbnbCereal"+fontSuffix+"-Medium",
		bold: "AirbnbCereal"+fontSuffix+"-Bold"
	}
}

Screenshots (if applicable)

What have you tried

Your Environment

software	version
ios or android	android
react-native	0.57.3
react-native-paper	2.2.4
node	8.9
npm or yarn	yarn