UR824 power off causes MacBook Pro to reboot

Hi. I’m a brand new Cubase/Steinberg user. Less than 60 minutes experience, actually.

I searched but could not find any details on this issue - forgive me if I missed it here.

Why does turning the UR824 power off cause my laptop (MacBook Pro, OS X 10.8.2) to immediately reboot?

Thanks for any advice you may have.

No longer an issue. Not sure which update fixed it, but the problem has disappeared.