Inner destructured property not received by ELK stack as destructured, but as escaped string - azure-service-fabric

Question

I'm not sure if this is a Serilog, ELK, Service Fabric, code or config issue.
I am writing a Service Fabric Stateless Service. My logging configuration line is this:
Logger = new LoggerConfiguration()
.WriteTo.EventFlow(loggingOptions.DiagnosticPipeline)
.Destructure.With<JsonNetDestructuringPolicy>()
.Enrich.FromLogContext()
.CreateLogger()
.ForContext(properties);
...where properties is an array of PropertyEnricher and the Policy is from Destructurama's JsonNetDestructuringPolicy.
I have a custom object base class that is successfully being destructured, so if I call it Data, then in ELK's JSON tab I see:
"payload": {
"Data": {
"Property1": "Prop Value",
"Property2": "Prop2 Value"
}
}
However, when one of the inner objects is also destructured, it is sent as an escaped JSON string instead of being destructured, with no quotes around the property names:
"payload": {
"Data": {
"Property1": "Prop Value",
"DestructuredProp": "{InnerProperty: \"Inner Value\"}"
}
}
What I expected was:
"payload": {
"Data": {
"Property1": "Prop Value",
"DestructuredProp": {
"InnerProperty": "Inner Value"
}
}
}
I don't know why the inner property names are not given quotes, or why the entire value is being escaped and quoted instead of destructured.
I have verified that my destructuring code is being executed. I can manually add quotes around the property name, for example, but it just results in more escaped quotes in the inner value.
My own code was destructuring it directly from C#. I thought it might have been a bug in my destructuring code, so I looked around some more and found Destructurama's JsonNetDestructuringPolicy, so I tried that, converting my object with JObject.fromObject(), but the same thing happens with it.
I'm pretty sure I should be able to do this with Serilog. I don't think there would be a depth limit setting if it couldn't do more than one layer deep. Why doesn't this work? I have tried refreshing the field index in Kibana, but the JSON view shows the escaped string, so I'm pretty sure it is being sent incorrectly, and isn't an ELK issue.
---EDIT---
Here is a destructuring policy I tried. My initial object is JsonEvent, and it has a Dictionary that is not destructuring, even though the Dictionayr policy is successfully being invoked.
public class JsonEventDestructuringPolicy : IDestructuringPolicy
{
public bool TryDestructure(object value, ILogEventPropertyValueFactory propertyValueFactory, out LogEventPropertyValue result)
{
if (value is JsonEvent jsonEvent)
{
var properties = new List<LogEventProperty>();
foreach (var property in value.GetType().GetProperties())
{
var propertyValue = property.GetValue(value);
var isCollection = propertyValue is ICollection<Dictionary<string,string>>;
var isDictionary = propertyValue is Dictionary<string,string>;
if (isCollection)
LoggingContext.Message("Found collection of dictionary: " + property.Name);
else if (isDictionary)
LoggingContext.Message("Found dictionary: " + property.Name);
else if (property.Name.Equals("Parameters"))
LoggingContext.Message("Found Parameters: " + propertyValue.GetType());
if (propertyValue != null)
properties.Add(new LogEventProperty(property.Name, propertyValueFactory.CreatePropertyValue(propertyValue, isCollection || isDictionary)));
}
result = new StructureValue(properties);
return true;
}
if (value is Dictionary<string, string> dictionary)
{
var properties = new List<LogEventProperty>();
foreach (var kvp in dictionary)
{
if (!string.IsNullOrWhiteSpace(kvp.Value))
properties.Add(new LogEventProperty("\"" + kvp.Key + "\"", propertyValueFactory.CreatePropertyValue(kvp.Value)));
}
result = new StructureValue(properties);
return true;
}
result = null;
return false;
}
}
It is being invoked like this:
public static void Message(JsonEvent message)
{
Logger.ForContext(GetEnrichers(message))
.Information(message.Event);
}
private static IEnumerable<ILogEventEnricher> GetEnrichers(JsonEvent message)
{
return new List<ILogEventEnricher>()
.Add("Data", message, true)
.Add("CorrelationId", ServiceTracingContext.CorrelationId)
.Add("CorrelationDateTime", ServiceTracingContext.CorrelationDateTime)
.Add("RouteTemplate", ServiceTracingContext.RouteTemplate)
.ToArray();
}