I have finally uncovered the entire mosaic and have found the 4th piece of the gong but how or who has to collect it? I have tried elders, masters, children, using the same person as the totem used to uncover it, dropping a 2nd totem on it, using 2 or 3 people and nothing seems to work. Is there a trick to this??? After spending so long at the game, I want to really bong the gong! Please help!

HayClan Mom

Exit the game, launch it again, and repeat the puzzle solution. That usually resolves the problem.