How do 'Process Steps' work when you split a feature

[Bob Hunt]

Our Features go through a maturity definition phase from initial definition through to Development Ready (i.e. Feature Definition --> Feature Refinement --> Development Refinement --> Development Ready) At Dev. Ready the feature can be worked on in a PI.

When we split the feature it seems that the original Feature's 'Process Step' is not carried over to the split feature. Is this a bug? or is this expected behavior?

Thanks in adavance!