React Native ScrollView/FlatList not scrolling - reactjs

Question

I have a list of data that I want to place inside a FlatList (i.e. ScrollView) and whenever I try to scroll down to view more of the list, the ScrollView just bounces back up to the top of the list so I cannot ever see the bottom of the list.
I am using Expo and the strange thing is that if I just create a new project or copy/paste some code into Snack then the scrolling works just fine. It is only in my current project that I cannot get the list to scroll. I have even gone into the main.js file and just pasted my example code in there and the issue still persists.
My example code is located here: https://snack.expo.io/ryDPtO5-b
I have pasted this exact code into my project and it is not working as expected.
Versions:
RN 0.44 /
Expo SDK 17.0.0 /
React: 16.0.0-alpha.6
My actual use case for my project involves placing a FlatList component at the bottom-third of the screen to show a list of jobs. This is where I discovered the error and when I started to try and debug the issue. In my project I have a parent View with a style of {flex: 1 with a child of List that contains the FlatList... List comes from react-native-elements
EDIT
Here is the code I am actually trying to use:
<View style={styles.container}>
<View style={containerStyles.headerContainerStyle}>
<Text style={[textStyles.h2, { textAlign: "center" }]}>
Territory: {this.props.currentTerritory}
</Text>
</View>
<View style={styles.mapContainer}>
<MapView
provider="google"
onRegionChangeComplete={this.onRegionChangeComplete}
region={this.state.region}
style={{ flex: 1 }}
>
{this.renderMapMarkers()}
</MapView>
</View>
<Badge containerStyle={styles.badgeStyle}>
<Text>Orders Remaining: {this.props.jobsList.length}</Text>
</Badge>
<List containerStyle={{ flex: 1 }}>
<FlatList
data={this.props.jobsList}
keyExtractor={item => item.id}
renderItem={this.renderJobs}
removeClippedSubviews={false}
/>
</List>
</View>;
And all my styles
const styles = StyleSheet.create({
container: {
flex: 1,
},
mapContainer: {
height: 300,
},
badgeStyle: {
backgroundColor: 'green',
alignSelf: 'center',
marginTop: 15,
width: 300,
height: 35,
},
});
and lastly, my renderItem function:
renderJobs = ({ item }) => {
const { fullAddress, pickupTime } = item;
return (
<ListItem
containerStyle={
item.status === "active" && { backgroundColor: "#7fbf7f" }
}
title={fullAddress}
titleStyle={{ fontSize: 14 }}
subtitle={pickupTime}
subtitleStyle={{ fontSize: 12, color: "black" }}
onPress={() =>
this.props.navigation.navigate("jobActions", { job: item })
}
/>
);
};

Answer 1

I was able to solve this problem.
The Solution is to use flatlist component <View style={{flex:1}}> after renderRow return component <View style={{flex:1}}>

Answer 2

I am confused - are you using a FlatList or a ScrollView - these two elements have completely different lifecycle events (a FlatList requires you to define how individual rows will render and their keys, whereas a ScrollView expects the children to be rendered inline with the component).
Regardless, I think the issue is in your structure, it sounds like the List element requires a height attribute as well ({flex: 1}) as the absolute parent is filling it's space, but the List component is not having a pre-defined height.

Answer 3

So after debugging this a bit more today and I ended up just creating a brand new Expo project and copy/pasting all my source code into the new project, changing my Github project name to the new name, and setting the remote origin to my github repo (the one where I changed the name) on my new local project.
For some reason there appeared to be a problem with the Expo project. It almost seemed like the actual NAME of the project was causing issues as I attempted to change the NEW project's name to that of the original project, but it didn't work. It only worked when doing a brand new project, but using the exact same source code.