Particle system inside the group is not affected by Canvas Group Alpha

Hi.

I'm using canvas group alpha quite often, but today I found out that canvas group alpha is not worked on particle system. the reason is I want to use animation on the button to increase the alpha, so the hidden button would appear overtime along with particle inside it.

I put the particle inside a button group and put canvas group on the button. text and image inside the button is working, but particle is not affected.
I've tried put the button and particle (separated) inside an empty object and give it canvas group, but it's not working as well.

is there any way to make it work?
thank you.

PS : I'm using unity 2019.4.3f1 building 2D games.