I don't see any videos for this or others having this issue so it might just be an isolated incident. After completing flashpoint normally with one character and moving to my next character, it completes the milestone after one heroic pe is done (from 0%-100%). I used my Titan first then went to my Hunter and it did this, I am going to double check with my Warlock but I thought I'd ask this question now. So its not an issue of same gardian type. Did anyone else have this issue? I have over 1000 Heroic PE's completed under my belt and this has never happened. I was bummed to complete the flashpoint for my Hunter in only one event as I love to use the Orpheus Rig tether trick.