Changing shadow strength on a light affects volumetric shadows on another light

[luuktito]

So lets say I have a point light or spot light somewhere with a volumetric light.
This light will have a shadow strength of something less than 1, let's say 0.7;
Now I add a second light with a volumetric light. This one will have a strength of 1.
The second light's volumetric shadow now behaves like it has the shadow strength of the first one.

Also changing the strength of the first light now affects both volumetric lights.
So basically the volumetric lights take the lowest shadow strength of all volumetric lights that are available and uses it for all volumetric shadows in the players view.
It happens with both spot lights and point lights.