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I have find a sample code to reproduce that

        setContent {
            val dialogState = remember { DialogState() }
            dialogState.Intercept()
            LaunchedEffect(Unit) {
                delay(1000)
                dialogState.bgWork {
                    delay(5000)
                }
                dialogState.showSelectActions {
                    onSelect("a") {

                    }
                    onSelect("b") {

                    }
                }
            }
        }

You can find implementation of DialogState here https://github.com/FooIbar/EhViewer/blob/ef16bdeb755ae888c74eaa4a337bd5b708fcc97e/app/src/main/kotlin/com/hippo/ehviewer/ui/tools/Dialog.kt#L92
https://github.com/FooIbar/EhViewer/blob/main/app/src/main/kotlin/com/hippo/ehviewer/util/Progress.kt Launch that Activity, wait 6 seconds and it will crash

Let me sort it out

The first crash
Reproduce: navigate to a gallery and navigate back
The reason is we have some code assume the forget order of RememberObserver(DisposableEffect), and 52835066c9044647a65dfb566f03131aab46e793 changed the order. Seems this is a intended behaviour.
I will fix it from my side. My bad

The second crash
Reproduce: #4 comment
StackTrace: https://bin.kv2.dev/~65d5c6175de7ed6bfdbdf1bd
We got a wrong object from SlotTable during recompose

And interestingly, if we insert delay(1000) between two dialog suspend usage

                dialogState.bgWork {
                    delay(5000)
                }
                delay(1000)
                dialogState.showSelectActions {
                    onSelect("a") {

                    }
                    onSelect("b") {

                    }
                }

It will not crash

I tried cutting down the example myself and was not able to reproduce this.

The primary dependency chagnes I made were:

compose-material3 = { module = "androidx.compose.material3:material3", version = "1.3.0-SNAPSHOT" }
compose-foundation = { module = "androidx.compose.foundation:foundation-android", version = "1.7.0-SNAPSHOT" }

I only included the part of the Dialog.kt that was needed by the above,

class DialogState {
    var content: (@Composable () -> Unit)? by mutableStateOf(null)

    @Composable
    fun Intercept() = content?.invoke()

    fun dismiss() {
        content = null
    }

    suspend inline fun <R> dialog(crossinline block: @Composable (CancellableContinuation<R>) -> Unit) = suspendCancellableCoroutine<R> { cont ->
        cont.invokeOnCancellation { dismiss() }
        val realContinuation = object : CancellableContinuation<R> by cont {
            override fun resumeWith(result: Result<R>) {
                dismiss()
                cont.resumeWith(result)
            }
        }
        content = { block(realContinuation) }
    }

    suspend inline fun showSelectActions(
        title: String? = null,
        builder: ActionScope.() -> Unit,
    ) {
        val (items, actions) = buildList { builder(ActionScope { action, that -> add(action to that) }) }.unzip()
        val selected = showSelectItem(items, title)
        actions[selected].invoke()
    }

    suspend fun showSelectItem(
        items: List<String>,
        title: String?,
        respectDefaultWidth: Boolean = true,
    ): Int = showNoButton(respectDefaultWidth) {
        Column(modifier = Modifier.padding(vertical = 8.dp)) {
            if (title != null) {
                Text(
                    text = title,
                    modifier = Modifier.padding(horizontal = 24.dp, vertical = 8.dp),
                    style = MaterialTheme.typography.headlineSmall,
                )
            }
            LazyColumn {
                itemsIndexed(items) { index, text ->
                    CompositionLocalProvider(LocalContentColor provides MaterialTheme.colorScheme.tertiary) {
                        Text(
                            text = text,
                            modifier = Modifier.clickable { dismissWith(index) }.fillMaxWidth()
                                .padding(horizontal = 24.dp, vertical = 16.dp),
                            style = MaterialTheme.typography.titleMedium,
                        )
                    }
                }
            }
        }
    }

    @OptIn(ExperimentalMaterial3Api::class)
    suspend fun <R> showNoButton(respectDefaultWidth: Boolean = true, block: @Composable DismissDialogScope<R>.() -> Unit): R {
        return dialog { cont ->
            val impl = remember(cont) {
                DismissDialogScope<R> {
                    cont.resume(it)
                }
            }
            BasicAlertDialog(
                onDismissRequest = { cont.cancel() },
                properties = DialogProperties(usePlatformDefaultWidth = respectDefaultWidth),
                content = {
                    Surface(
                        modifier = with(Modifier) { if (!respectDefaultWidth) defaultMinSize(280.dp) else width(280.dp) },
                        shape = AlertDialogDefaults.shape,
                        color = AlertDialogDefaults.containerColor,
                        tonalElevation = AlertDialogDefaults.TonalElevation,
                        content = { block(impl) },
                    )
                },
            )
        }
    }
}

fun interface ActionScope {
    fun onSelect(action: String, that: suspend () -> Unit)
}

fun interface DismissDialogScope<R> {
    fun dismissWith(value: R)
}

This shows the "Please wait" and then selection between "a" and "b" as I expected.

This requires compose compiler 1.5.11-dev-k2.0.0-Beta4-21f5e479a96
I will upload a sample project soon