So I've been running the concealed void lost sector for the past 2 days on my Titan. I ran it 17 times yesterday wen it was legendary, and I've run it currently 13 times on Master. For master it states that enhancement cores are uncommon, and an exotic helmet is common, but I still haven't gotten an exotic and get enhancement cores every couple of runs. On the Legend lost sector I figured just bad RNG, but now nothing even after 13 completions on Master in addition to the 17 on legend seems like this may be a bug. Especially since I am receiving the "uncommon" reward so much more often than the "common" reward.