Directory.SetAccessControl does not set InheritanceFlags and PropagationFlags about longpath HOT 2 OPEN

private static FileSystemAccessRule GetFileSystemAccessRule(string path)
{
    return Directory.GetAccessControl(path).GetAccessRules(true, false, typeof(SecurityIdentifier)).OfType<FileSystemAccessRule>().Single();
}

[TestMethod]
public void TestDirectorySetAccessControl()
{
    var path = Path.Combine(Path.GetTempPath(), "TestDir");
    var security = new DirectorySecurity();

    var localAdmins = new SecurityIdentifier(WellKnownSidType.BuiltinAdministratorsSid, null);
    security.AddAccessRule(new FileSystemAccessRule(localAdmins,
        FileSystemRights.FullControl,
        InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit,
        PropagationFlags.NoPropagateInherit,
        AccessControlType.Allow));

    // System.IO.Directory.SetAccessControl works fine
    Assert.IsFalse(Directory.Exists(path));
    System.IO.Directory.CreateDirectory(path);
    try
    {
        System.IO.Directory.SetAccessControl(path, security);
        Assert.AreEqual(GetFileSystemAccessRule(path).InheritanceFlags, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit);
        Assert.AreEqual(GetFileSystemAccessRule(path).PropagationFlags, PropagationFlags.NoPropagateInherit);
    }
    finally
    {
        Directory.Delete(path);
    }

    // Pri.LongPath.Directory.SetAccessControl fails
    Assert.IsFalse(Directory.Exists(path));
    Pri.LongPath.Directory.CreateDirectory(path);
    try
    {
        Pri.LongPath.Directory.SetAccessControl(path, security);
        Assert.AreEqual(GetFileSystemAccessRule(path).InheritanceFlags, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit);
        Assert.AreEqual(GetFileSystemAccessRule(path).PropagationFlags, PropagationFlags.NoPropagateInherit);
    }
    finally
    {
        Directory.Delete(path);
    }
}