No Nstep notification if I come back to the staging mode

It looks like I do not receive any email notifications when I come back to the staging mode during a Nstep workflow.

So I have a page with 2 distinct nstep workflow and a sub page. All are in staging. I move all of them to step 1. (I receveive a email notification). Then I decide to refuse all changes and to invalidate the workflow to come back in staging. Then I am not receiving any email notifications in such a case.

Coudl you check each possible step of the Nstpe in order to be sure that all emails are correctly fired? thx.