Neither can I at this point, being 150 seasonal lvl and having at least 100h in, I have only 1319. Maybe I'm bad a lvling my light, could be that as well. All in all, it is not a big deal, true and it seems that you will still get the bright dust (as I see that many say that you do not need to complete all challenges), but just as in you, mine inner completionist is also gonna hate it.