Using 'Return Normalized Exec Index' for the Width or Alpha Curve index the Ribbon Renderer causes an unintended value to be applied to the start of the ribbon.

Development Asset Creation FX
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Hi.I have a question Niagara Ribbon Renderer.
You can see the problem clearly in the attached images.

The top ribbon uses Normalized Age, and the Bottom one uses Return Normalized Exec Index.
The curve setting shown are for the setup using ‘Return Normalized Exec Index’.
It is clearly receiving an unintended value.

I have confirmed this issue in UE5.5 and UE5.6,but I have not tested it in earlier versions.