Snackbar with Message Box throws error in newer versions

After version 3.1.3, if a snackbar's action is set to display a message box, and that message box is closed after the snackbar closes, the application will throw a "System.ObjectDisposedException: 'Safe handle has been closed'" exception.

Step 1

Step 2

Step 3

Step 4 (After closing the message box)

This exception is only thrown on versions after 3.1.3.
Maybe it's possible to add a bool argument to Enqueue() or a MessageQueue property to execute the older code?

Here's the link to the test app's repo: https://github.com/SilentSammy/SnackbarBug
Also attached is the project as a zip file just in case: SnackbarBug.zip

@Keboo

There's an error in code @Keboo
SnackbarMessageQueue => CreateAndShowMessage => anonymous delegate snackbarMessage.ActionClick subscribe.
We dispose EventWaitHandle after some time and then call .Set() method on it - it's unsafe and application may shutdown immediately.
At least I suggest to add this check

if (++clickCount == 1)
    DoActionCallback(messageQueueItem);
if (actionClickWaitHandle.SafeWaitHandle.IsInvalid || actionClickWaitHandle.SafeWaitHandle.IsClosed)
    return;
actionClickWaitHandle.Set();

Fixed long-running operations on SnackBarMessage callback (MaterialDe…

Fixed long-running operations on SnackBarMessage callback (#2627) (#2631

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Snackbar with Message Box throws error in newer versions #2627

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Snackbar with Message Box throws error in newer versions #2627

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Erapchu commented on Mar 31, 2022

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