onSnapToItem never gets called

Using "react-native-snap-carousel": "3.7.5"
Testing on iOS

Here is my code

<Carousel
                    ref={(c) => { this._carousel = c; }}
                    vertical={true}
                    data={["1", "2", "3", "4", "5", "6", "7", "8"]}
                    renderItem={({ item, index }) =>

                        <TouchableOpacity
                            style={{ flex: 1, backgroundColor: "transparent" }}
                            onPress={() => { this._carousel.snapToItem(index) }}>
                            <Text
                                style={{
                                    height: 30,
                                    textAlignVertical: 'center',
                                    flex: 1,
                                    textAlign: 'center',
                                    fontSize: 16
                                }} key={"money" + item}>{item}</Text>
                        </TouchableOpacity>
                    }
                    onSnapToItem={(index) => {
                        console.log("Moved to=====> " + index)
                        alert(index)
                    }}
                    inactiveSlideOpacity={0.4}
                    inactiveSlideScale={0.9}
                    enableSnap={true}
                    removeClippedSubviews={false}
                    autoplay={false}
                    sliderHeight={80}
                    sliderWidth={90}
                    itemHeight={30}
                    itemWidth={90}
                />

Reproduce the iOS case using the shown Carousel configuration, then trace the snapToItem entry point and the onSnapToItem callback path. Confirm the cause by getting the callback to log and alert the selected index after an item is snapped.