I have done at least 50 lost sector runs, gotten about 8 exotics, all previously acquired, and I'm unable to get any of the new exotics. This is just not for one character, but for all my classes. I'm only posting about this because bungie has clarified that new exotics are prioritized, but I'm not seeing any evidence of that.
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You are playing on a platform that owns the required DLC for the items you're trying to get? ie witch queen if you're going for stuff like loreley, fallen sunstar etc?