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kotlinlang

With the update to Compose 2025.04.01 we observe flaky behavior in a screen with two composables inside a Theme:
```override fun onCreate(...) {
    setContent {
        uiState by viewModel.uiState.collectAsStateWithLifecycle()
            
        MyTheme {
            MyScreen(uiState)
            (uiState.overlayState as? ScannedItemOvelayState)?.let { scannedItemOverlayState ->
                MyOverlay(scannedItemOverlayState)
            }        
        }
    }
}```
The flakiness is that `MyOverlay` is sometimes not hidden even though `showOverlay` is null.
However, when I wrap those both composables in a `Box`, `MyOverlay` is hidden reliably every time.

Is there some rule that the lambda inside a `MaterialTheme` has to only produce one composable?