We will be pushing a patch live tomorrow. Players will be returned to the title screen from their activities and then be required to log in to Destiny again after installing the patch.
Hunter Nightstalker perk "Light of the Pack" only provides additional Orbs of Light to the player who provided the Tether.
Currently, the Hunter Nightstalker perk "Light of the Pack" reads as follows: "Killing tethered targets creates Orbs of Light for your allies."
In practice, this perk only applies to Tethers created by the player's own Super, not to Tethers created by other players.