How can I get Niagara warm-up to work?

Development Asset Creation FX
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1

In Cascade I merely set a warm-up time, and it just worked, this doesn’t work for me in Niagara… Am I missing something?

2

See images below from UE 4.25.1
Does not seem to work with GPU particles.

309310-capture.jpg

309311-capture02.jpg
309311-capture02.jpg886×1063 56.1 KB

3

Thanks! It’s saves me