No, I was playing Quest mode, not story. No characters died, and it was on Heroic difficulty.
Everytime I go to start a new Quest, it just takes me to the "Victory" page, and I cannot progress any further due to this bug.
After completing a quest, two of my party were eligible for a power feat. After selecting the feat for one character, I cannot select select a feat for the other.
This is particularly frustrating as my characters are now "locked" at the rewards screen.