All Destiny releases will be temporarily offline tomorrow for scheduled maintenance. Please stay tuned to @BungieHelp for updates.
Once we successfully clear the second floor of the second encounter in Root of Nightmares the final light bubble is not provided the buff necessary to damage the immune enemies. Bottom floor works fine, second floor has failed to give us the buff multiple times. The timer clears so we know we properly ran the bubbles but there's no way to progress after that.