I've been fighting this for months. Happens at least once a week. Twice to the SC with no resolution. My workaround has been get in, press brake, get out, shut & lock, walk out of range with the key for 5-10 minutes then go back.
Edit: that was weird; must have had a "draft" saved in my browser cache? At any rate, that's awesome to hear; I'm still seeing it so here's hoping 8 fixes it.