Inverted Flatlist scrolling wrong direction when flicking at bottom

[hardcodet]

This may be a regression of #171

Repro (Android 10):

Scroll to the end (bottom) of an inverted FlatList. When at the end, perform a few flicks further towards the bottom. Expected behavior here is that nothing would happen. What happens though is that the list suddenly scrolls back up.

Workaround: Replacing RNGH FlatList with RN FlatList fixes the issue.

Package versions

RNGH: 1.7.0
Expo SDK 39

[jakub-gonet]

Could you please provide some small repro?

[kirillpisarev]

Have the same issue with
"react-native-gesture-handler": "^1.8.0"
"react-native": "0.63.2"

inverted FlatList from react-native works fine as mentioned above.

code to reproduce:

import React from "react"
import { View } from "react-native"
import { FlatList } from "react-native-gesture-handler"

export const MessageList = () => {
	return (
		<FlatList
			inverted
			data={Array(50).fill(1)}
			renderItem={() => <View style={{ height: 100, backgroundColor: "red" }} />}
		/>
	)
}

illustration what happens (i'm trying to scroll down):

[nickksm]

Same issue here like @kirillpisarev

[tomekzaw]

Hello! Did you manage to resolve this issue? If not, can you please check if this issue still occurs on the latest version of react-native-gesture-handler and some newer version of react-native?

After activation, NativeViewGestureHandler will send touch events directly to ScrollView from react-native so the workaround from facebook/react-native#21117 should be applied automatically. Nevertheless, we will need to delve into this issue.