[iOS] LazyColumn with imePadding and TextField scrolls incorrectly when keyboard is shown

[m-sasha]

Describe the bug
When a TextField inside LazyColumn with Modifier.imePadding receives focus and the keyboard is displayed, the column is placed incorrectly, sometimes leaving a gap between itself and the keyboard.

Affected platforms

• iOS

Versions

• Kotlin version*: 1.9.21
• Compose Multiplatform version*: 1.5.11

To Reproduce

@Composable
fun IosApp() {
    MaterialTheme {
        LazyColumn(Modifier.imePadding().fillMaxSize().background(Color.Yellow)) {
            items(10) {
                ListItem()
            }
        }
    }
}


@Composable
private fun ListItem() {
    var text by remember { mutableStateOf("") }
    TextField(
        value = text,
        onValueChange = { text = it },
        modifier = Modifier.fillMaxWidth().padding(vertical = 40.dp, horizontal = 20.dp)
    )
}

Screenshots

Simulator.Screen.Recording.-.iPhone.15.Pro.-.2023-12-08.at.07.43.40.mp4

This has already been reported in #3621, but that reports several bugs in one ticket, and this has a more specific reproducer.

[mortphose]

For anyone that runs into this, setting onFocusBehavior = OnFocusBehavior.DoNothing in the ComposeUIViewController fixed this for me. Found it in this merge.

[Krobys]

For anyone that runs into this, setting onFocusBehavior = OnFocusBehavior.DoNothing in the ComposeUIViewController fixed this for me. Found it in this merge.

Thank you so much!!! I spent literally 2 days trying to understand whats going on.

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.