Both were done on my Titan. Bubble with dmt (kinetic), enigma (void), and palmyra (stasis). Solo. Empty Grief didn't pop. Thundercrash with riiswalker (kinetic), trinity ghoul (arc), and palmyra (stasis). With a chaos Warlock teammate. Sparking rage didn't pop for me, but did for him. What exactly is the problem here? Started both activities with the appropriate gear per the challenges, never changed during the activities, so why are they not completing?