Can't progress to next enemy in dungeon

Platform, device and operation system
Android, Samsung Galaxy s21 ultra

What were you expecting to happen, and what actually happened
I was heading to the council (dungeon 4) and after beating the second enemy in the dungeon, the game froze…in a sense. It just showed my player and the enemy I just beat. The puzzle board was gone. Characters still had idle movements but the game just didn’t progress to the next enemy. Had to back out of the dungeon and loose progress. No other option.

How often does this happen? When did it begin happening?
Only happened once so far. First time attempting dungeon (dungeon 4, council)

Steps to make it happen again
Only thing I can think of is that I stunned the enemy with the final blow. Not sure if that made it happen.