Troubleshooting wrong logs sent to Loki

[georgiosd]

Hey guys

I'd love some help to troubleshoot this, currently our Loki instance is pretty much unusable - it was working fine for a while, then there were upgrades both on the hosted Grafana/Loki instance and our .NET packages/config and I'm not sure when it broke.

What I'm seeing is that the actual logger labels are not included, and the json fields and not detected even with | json.

Screenshot below. The exact same output occurs after adding | json too or removing escaping of newlines.

Any ideas what could be wrong?

PS: Only Application (my own) and service_name labels are detected. My config is nothing exotic:

"Serilog": {
    "MinimumLevel": {
      "Default": "Debug",
      "Override": {
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Information",
        "System.Net.Http.HttpClient": "Warning"
      }
    },
    "WriteTo": {
      "Console": {
        "Name": "Console",
        "Args": {
          "restrictedToMinimumLevel": "Debug",
          "outputTemplate": "{Timestamp:dd-MM-yyyy HH:mm:ss} [{Level:u3}] [{SourceContext}] {Message}{NewLine}{Properties}{NewLine}{Exception}"
        }
      },
      "Loki": {
        "Name": "GrafanaLoki",
        "Args": {
          "uri": "...",
          "httpClient": "Custom client that accepts credentials",
          "propertiesAsLabels": [
            "Application"
          ],
          "credentials": {
            "Password": "..."
          }
        }
      }
    }