Dumplings can run away from battle in a mirrorball. When the battle is over an exalted emblem is not rewarded (separate bug?).
If the player is facing the mirrorball after winning the battle described above and presses the E button a frame(maybe two) after the reward screen a second battle sometimes starts. In my case, it was a second set of six dumpling.
Although it’s such a rare event for a second battle that I’ve only noticed it twice. So the previous paragraph may not be exactly right.