IOS picker bar icons not displaying properly on iPhone 7 Plus, 8 Plus about react-native-picker-select HOT 14 CLOSED

const pickerSelectStyles = {
    inputIOS: {
        fontSize: 16,
        paddingTop: 13,
        paddingHorizontal: 10,
        paddingBottom: 12,
        borderColor: 'gray',
        borderRadius: 4,
        backgroundColor: 'transparent',
        color: 'white',
    },
    inputAndroid: {
        color: 'white'
    },
    placeholderColor: 'white',
    underline: {
        borderTopWidth: 0
    },
    icon: {
        position: 'absolute',
        backgroundColor: 'transparent',
        borderTopWidth: 5,
        borderTopColor: 'white',
        borderRightWidth: 5,
        borderRightColor: 'transparent',
        borderLeftWidth: 5,
        borderLeftColor: 'transparent',
        width: 0,
        height: 0,
        top: 20,
        right: 15,
    },
};

"react": "16.0.0",
"react-native": "^0.50.0",
"react-native-picker-select": "^4.0.0",

clicked = false;
constructor(props) {
    super(props);
    this.props.navigator.setOnNavigatorEvent(this.onNavigatorEvent);
    this.state = {
        selectedCity: null,
        cities: [
            {
                value: 1,
                label: "Tirane"
            }
        ],
        selectedSpecialty: null,
        specialties: [
            {
                value: 1,
                label: "Alergolog"
            }
        ]
    };
}

fetchDoctors(location, specialty) {
       //Unrelated Code
};

submitButtonHandler = () => {
  //Unrelated Code
};

render() {
    return (
        <ImageBackground style={styles.backgroundImage} source={backgroundImage}>
            <View style={[styles.container, styles.logoContainer]}>
                <Image
                    width={Dimensions.get('window').width * 0.8}
                    source={logo}
                    style={styles.logo}
                />
            </View>
            <View style={[styles.container, styles.formContainer]}>
                <RNPickerSelect
                    placeholder={{
                        label: 'Zgjidhni qytetin...',
                        value: null,
                    }}

                    items={this.state.cities}

                    onValueChange={(value) => {
                        this.setState({
                            selectedCity: value,
                        });
                    }}

                    style={{...pickerSelectStyles}}

                    value={this.state.selectedCity}
                />
                <View style={{paddingVertical: 5}}/>
                <RNPickerSelect
                    placeholder={{
                        label: 'Zgjidhni specialitetin...',
                        value: null,
                    }}

                    items={this.state.specialties}

                    style={{...pickerSelectStyles}}

                    onValueChange={(value) => {
                        this.setState({
                            selectedSpecialty: value,
                        });
                    }}

                    value={this.state.submitButtonContainer}
                />
                <View style={[styles.submitButtonContainer]}>
                    <TouchableOpacity style={styles.submitButton} onPress={
                        debounce(this.submitButtonHandler, 1000, {
                            leading: true,
                            trailing: false
                        })
                    }>
                        <Text style={styles.submitButtonText}> GJEJ DOKTORIN </Text>
                    </TouchableOpacity>
                </View>
            </View>
        </ImageBackground>
    );
}