[iOS] voice dictation text does not register with text fields using TextFieldValue

[garrison-henkle]

Describe the bug
When using the iOS stock keyboard's voice dictation in a BasicTextField using TextFieldValue, the dictated text is cleared when voice dictation is disabled.

Affected platforms

• iOS

Versions

• Libraries:
  • Compose Multiplatform version: 1.6.11
• Kotlin version: 2.0.0
• OS version(s) (required for Desktop and iOS issues): iOS 17.5.1
• OS architecture (x86 or arm64): N/A
• Device (model or simulator for iOS issues): iPhone SE 2020, but reported on newer models as well
• JDK (for desktop issues): N/A

To Reproduce
Steps to reproduce the behavior:

1. Create a BasicTextField using TextFieldValue e.g.

var textState by remember { mutableStateOf(TextFieldValue()) }
BasicTextField(
    value = textState,
    onValueChange = { textState = it },
)

2. Click on the voice dictation button on the stock iOS keyboard
3. Dictate
4. Tap on the screen to end the dictation
5. The text will disappear as soon as dictation ends

Repo that reproduces the issue on my device:
https://github.com/garrison-henkle/composeMultiplatformVoiceDictationBug

Expected behavior
The text does not disappear when dictation ends

Screenshots
https://github.com/JetBrains/compose-multiplatform/assets/70973354/d4997920-0a77-479e-a5a9-26b7be7259a1

Additional context

[garrison-henkle]

I played around with the debugger / print statements for a bit this afternoon. To reproduce in the compose-multiplatform-core repo, I added the following to androidx.compose.mpp.demo.textfield.android.TextFieldValueDemo:

item {
    TagLine("TextFieldValue overload")
    var state by remember { mutableStateOf(TextFieldValue()) }
    BasicTextField(
        value = state,
        onValueChange = { state = it },
        textStyle = TextStyle(fontSize = fontSize8),
        modifier = demoTextFieldModifiers
    )
}

So far, the issue seems be somewhere afteronValueChangeOriginal is called in CoreTextField's onValueChange here. It is called with the correct TextFieldValue containing the dictated text, but the callback in the BasicTextField that I'm using receives what looks like a brand new empty TextFieldValue instance instead.

There is a currentRecomposeScope.invalidate() that is called immediately after the onValueChangeOriginal call, so I wonder if that is breaking something.