Beam Emitter Lifetime not working


I created a new project and I followed this tutorial but at 5:06 I don’t have the same result.

Color over life is not working.
I also tried with scale by life, and it is not working too.

But when I remove the Beam Data module, it works.

I will appreciate any help !

My material

My particle system


I saw this Unreal Engine Issues and Bug Tracker (UE-62477) and then I tried on UE4.21 and effectively it has been fixed.