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Noisemake preview invisible

Hello,

I have a problem which appeared suddenly: the noisemake preview does not appear anymore on the viewport.
I do have the noisemaker when i apply it to mesh, or when i do a BPR rendering, but nothing on standart viewport.
I tried on different projects or with a new tool, but same problem each time.

Did i desactivate something without knowing it ? Any way to get it back ?

Thank you !