DetectEntireAnomalyBySrCnn - No anomalies detected as of version 1.5.4 or greater

**System Information (please complete the following information):**
- OS & Version: Windows 10
- ML.NET Version: ML.NET 1.5.4 and greater
- .NET Version: .NET 5

**Describe the bug**

When using `DetectEntireAnomalyBySrCnn` with versions 1.5.4 or greater, no anomalies are detected when running the `DetectAnomaly` method from the [phone call tutorial](https://docs.microsoft.com/en-us/dotnet/machine-learning/tutorials/phone-calls-anomaly-detection).

Changing options does nothing. Has anything changed with this algorithm that would suddenly make it stop working after 1.5.4?

If you run the sample using version 1.5.2 with the same data and options it works.

Related docs issue dotnet/docs#23888

**To Reproduce**

Follow the steps in the [phone call tutorial](https://docs.microsoft.com/en-us/dotnet/machine-learning/tutorials/phone-calls-anomaly-detection). For reference, here's a [completed code sample](https://github.com/dotnet/docs/tree/main/docs/machine-learning/tutorials/snippets/phone-calls-anomaly-detection/csharp)

**Expected behavior**

Anomalies are detected.