[Bug Report]RegistryManager.GetDeviceAsync() returns null

[Gamecock]

Context

• OS, version, SKU and CPU architecture used: Azure Function Dotnet isolated Windows
• Application's .NET Target Framework : net8.0
• Device: N/A
• SDK version used:

Description of the issue

RegistryManager.GetDeviceAsync (string deviceId) returns a null if device is not found.
Per Code Expected DeviceNotFoundException

        {
            if (Logging.IsEnabled)
                Logging.Enter(this, $"Getting device: {deviceId}", nameof(GetDeviceAsync));
            try
            {
                if (string.IsNullOrWhiteSpace(deviceId))
                {
                    throw new ArgumentException(IotHubApiResources.GetString(ApiResources.ParameterCannotBeNullOrWhitespace, "deviceId"));
                }

                EnsureInstanceNotClosed();
                var errorMappingOverrides = new Dictionary<HttpStatusCode, Func<HttpResponseMessage, Task<Exception>>>()
                {
                    { HttpStatusCode.NotFound, async responseMessage => new DeviceNotFoundException(await ExceptionHandlingHelper.GetExceptionMessageAsync(responseMessage).ConfigureAwait(false)) }
                };

                return _httpClientHelper.GetAsync<Device>(GetRequestUri(deviceId), errorMappingOverrides, null, false, cancellationToken);

Code sample exhibiting the issue

[Fact]
public async Task TestRegistryManager()
{
    var registry = RegistryManager.CreateFromConnectionString(connectionString);

    await Assert.ThrowsAsync<DeviceNotFoundException>(async () => await registry.GetDeviceAsync("IDoNoTExist") );
}

Console log of the issue

Follow the instructions here to capture SDK logs.
Don't forget to remove any connection string information!

[Gamecock]

Documentation update to be clear non this behavior might be sufficient, but the DFE matches what is received from rest of SDK.