I have a Nexus 5 and I found its' sweet spot but I can't get it to unlock my phone. Any other Nexus 5 users got theirs to work?

This is weird... I got my ring and found its sweet spot. However, it shut down my phone (Nexus 5) and locked me out for several minutes. I wasn't able to turn it on manually, nor was it responding when I plugged it into its' charger. New bug, perhaps?