Clipping planes edge color for locked objects always gray

The problem occurs when the clipping plane is applied to a locked object. The setting in the ‘Display Options’ under ‘Clipping Planes → Edge Color’ is always ignored for locked objects.
This also happens when I set ‘Use object’s display attributes’ under ‘Objects → locked object usage’ in the Display Options. I am using Rhino v8.

Is there a way to change this behavior? I want to be able to use the specified edge color also for locked objects.