As the title states, my Xbox One completely locks up (screen and audio freezes in place) when the Firefly Perk is triggered. I have had it lock-up on three different occasions when someone in my fireteam is using a weapon with the Firefly Perk and it is triggered. It is worth mentioning that I am using the new Xbox One Preview Dashboard Experience (Beta Program). I just wanted to share with Bungie, in hopes that it'll be researched and fixed prior to the new Xbox One Dashboards final release date. Many thanks!