Quick and dirty extension method to fix up incorrectly parsed ContainerAppJobExecutionResource. Just call Fixup() on the Response<ContainerAppJobExecutionResource> object

ContainerAppJobExecutionResourceFixUp.cs

using Azure.ResourceManager.AppContainers;
using Azure;
using System.Text.Json;
using System.Threading.Tasks;
using Azure.ResourceManager.AppContainers.Models;
using System;
using System.Reflection;

// This is a fix up due to a bug in the original parsing of ContainerAppJobExecutionData 
// More detail on the bug here https://github.com/Azure/azure-sdk-for-net/issues/38385
// It's basically just reparsing the raw data to match the format that is actually returned from the service.

public static class ContainerAppJobExecutionResourceFixUp
{
	static public async Task FixUpAsync(this Response<ContainerAppJobExecutionResource> response)
	{
		var containerAppJobExecutionData = response.Value.Data;
		response.GetRawResponse().ContentStream.Position = 0;
		using JsonDocument jsonDocument = await JsonDocument.ParseAsync(response.GetRawResponse().ContentStream, default(JsonDocumentOptions)).ConfigureAwait(continueOnCapturedContext: false);

		JsonElement element = jsonDocument.RootElement;
		JobExecutionRunningState? status = null;
		DateTimeOffset? startTime = null;
		DateTimeOffset? endTime = null;

		foreach (JsonProperty item in element.EnumerateObject())
		{
			if (!item.NameEquals("properties") || item.Value.ValueKind == JsonValueKind.Null)
			{
				continue;
			}

			foreach (JsonProperty item3 in item.Value.EnumerateObject())
			{
				if (item3.NameEquals("status"))
				{
					if (item3.Value.ValueKind != JsonValueKind.Null)
					{
						status = new JobExecutionRunningState(item3.Value.GetString());
					}
				}
				else if (item3.NameEquals("startTime"))
				{
					if (item3.Value.ValueKind != JsonValueKind.Null)
					{
						JsonElement element2 = item3.Value;
						startTime = element2.GetDateTimeOffset();
					}
				}
				else if (item3.NameEquals("endTime"))
				{
					if (item3.Value.ValueKind != JsonValueKind.Null)
					{
						JsonElement element2 = item3.Value;
						endTime = element2.GetDateTimeOffset();
					}
				}
			}
		}
		containerAppJobExecutionData.SetProperty("Status", status);
		containerAppJobExecutionData.SetProperty("StartOn", startTime);
		containerAppJobExecutionData.SetProperty("EndOn", endTime);
	}


	static private void SetProperty(this object myObject, string propertyName, object value)
	{
		myObject.GetType().GetField($"<{propertyName}>k__BackingField", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(myObject, value);
	}
}