DetectEntireAnomalyBySrCnn - No anomalies detected as of version 1.5.4 or greater

[luisquintanilla]

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.

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. For reference, here's a completed code sample

Expected behavior

Anomalies are detected.

[michaelgsharp]

@luisquintanilla since this is a regression I would say its probably a higher priority. @briacht thoughts?

[briacht]

Yeah if the algorithm isn't working anymore we should definitely try and fix that

[michaelgsharp]

This is the PR that caused this bug #5202.