4.25 - Fast Path Animation Bug?

Hi,
Quick question, I have an anim blueprint, showing that warning :
Blend poses uses blueprint to update its value, access member variables directly or use a constant value for better performance.

So after reading the documentation (Animation Fast Path Optimization | Unreal Engine Documentation)
I don’t get what I’m doing wrong, because in my anim graph :

Any clue? x)

Or its a 4.25 bug ?

Thanks !

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Thanks