Jetpack Compose version: androidx.compose.material3:material3-android:1.2.0-alpha06 Jetpack Compose component used: ModalBottomSheet Android Studio Build: Build #AI-223.8836.35.2231.10671973, built on August 17, 2023 Kotlin version: 1.8.12 Devices/Android versions reproduced on: Pixel 6, AndroidStudio preview

ModalBottomSheet adds extra offset at the right of the screen visible on the screenshots. This is even more visible if you adjust preview width.

MaterialTheme {
    val sheetState = SheetState(
        skipPartiallyExpanded = true,
        initialValue = SheetValue.Hidden,
        density = LocalDensity.current,
    )
    var isBottomSheetOpen by remember {
        mutableStateOf(false)
    }

    Column(
        modifier = Modifier
            .fillMaxSize()
            .background(Color.Red),
        verticalArrangement = Arrangement.Center,
        horizontalAlignment = Alignment.CenterHorizontally,
    ) {
        Button(
            onClick = { isBottomSheetOpen = true },
            modifier = Modifier.fillMaxWidth(),
        ) {
            Text(text = "OPEN SHEET")
        }
    }

    if (isBottomSheetOpen) {
        ModalBottomSheet(
            onDismissRequest = { isBottomSheetOpen = false },
            containerColor = Color(0xFF0F0F0F),
            sheetState = sheetState,
        ) {
            Box(
                modifier = Modifier
                    .fillMaxWidth()
                    .height(300.dp)
            )
        }
    }
}