Hey @Flavio_nin!
So there are two visibilities:
There is one that makes it “not invisible”
and another that is a Collision Channel.
So when you set your actors to Visible or Hidden, it doesn’t affect the collision channel, only its literal visibility. You can change the collision response by using “Set Collision Profile” first, then tuning it with as many “Set collision response to Channel” nodes as you would need. 
Hope this helps!