Volume curves have impact even if they are disabled

Repro:

1) Add volumetric clouds to any scene.

2) Adjust the Erosion curve

3) Disable the property

 

Expected result:

When you toggle the Erosion curve, you can see the change being applied and reverted.

Result:

When you toggle the Erosion curve, nothing changes. The curve is applied at all times.

 

Alternative repro in the second video, with Exposure.