have tried the scenario thrice and didn't see any stale processes.
However I did see cluster.max-bricks-per-process not being honored
hence raised a seperate bug to track the same
BZ#1529514 - Brick Multiplexing:cluster.max-bricks-per-process not honored(more bricks being attached to glusterfsd) when we do a restart of bricks and glusterd (pkill glusterfsd glusterfs ,glusterd restart)
moved the bug to verified based on comment#4
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.