I think this is an instance of a bug I described earlier on this forum. I watched the replay and ~@14:30 the Chinese player didn’t finish his volley. When the NoB doesn’t finish their volley the next one after reloading won’t fire all rockets. I don’t think a unit dies or it is canceled manually in this clip because the reload bar doesn’t start directly after it stops firing.
The game was played on dry arabia 12/05 if anyone wants to watch the replay.