Story mission "The Time between the Seconds" is now having the same problem as Cold Steel.
It's a congestion problem; it's going to happen to any solo story instance that crosses the mystery congestion threshold, and they're pretty frequent throughout the story. It's why Pipin was error-free until a bunch of people got past Raubahn. It's part of why the "wait it out" response is so awful.
Everyone getting leveled up before getting past Cold Steel is going to ultimately make it worse, because there's the potential people won't even be broken up by dungeon grinds for XP if they're all overleveled already.