'gmirror stop' instantly restarts mirror

Hello,

I can't remember when I last used it, but doing 'gmirror stop RAIDNAME' 
should destroy the mirror and stay off, right?
With today's -current I get:
GEOM_MIRROR: Device TEST: provider mirror/TEST destroyed.
GEOM_MIRROR: Device TEST destroyed.
GEOM_MIRROR: Device mirror/TEST launched (2/2)

So the mirror gets relaunchend immediately after destroyed.
No idea what could be wrong.

Thanks for hints,

-Harry