I'm working on the catalyst and noticed progress did not track when getting the kills from the explosions when I took into the Battlefield playlist. I figured that's Bungie typical MO of limiting a great opportunity to level a catalyst. I just took it to Europa to work on some bounties and discovered progress did not increase after getting a dozen plus explosion kills. I was able to get progress on Nessus, but Destiny crashed consistently when loading into Artifacts Edge on PC and needed t find other options.