Thank you for your bug-report, Nightmare!
It will be reviewed as soon as possible by our Developers.
Weird because it works for me
/storm start
/storm stop
Tested on staging server (copy of live)
Let me attempt this again. Bear with me.
EDIT: Yeah, not working. Just attempted now.
I can't re-produce this bug so I leave this one open until confirmed
I also can't use it, it is possible that it's something Teacher related?