I'm having the same issues. I got the "Honing the Edge" step started on my Warlock and Hunter. So I know how to obtain the Exotic quest steps. Except when I started it on my Titan, I had already infused to 291 light. I was just one bubble away from full upgrade and knew I had some bounties to turn in on my Hunter. So I transfer my Sol Edge legendary to my Hunter, turn in bounties, finish the last upgrade, and transfer back to my Titan. No Exotic quest step for Titan. I check my Hunter to make sure I'm not missing the quest step and check abandoned missions. Nothing. Did I bug the quest? Is there a way to obtain the quest again? Please help, Bungie! The solar exotic sword happened to be the one I wanted to focus on and now it seems glitched! I have over 1500 hours into this game and have never been this frustrated!