Lucio heals don't stack?

If there are two healers on an ARAM game they can heal as much as they want, but if two or three lucios are playing together they don’t heal at the same time? I feel like this may just be balancing but at the very least it feels wrong.

Passive healing shouldn’t stack but you can easily take turns amplifying the music. It’s not really an issue and may be a deliberate design choice, same as how two heals over time from separate Malfurions wouldn’t stack on top of each other.

no thats is the point of lucio, passive damage stacks. if they dont stack take him out of rotation. complete bs