For lack of wood the fire goeth out; And where there is no whisperer, contention ceaseth (Prov. 26:20, ASV).
It is hard for people to stop talking. It is no less hard when it involves Christians.
People enjoy talking, and this may include talking about others when others ought not to be talked about.
Sometimes when Christians talk about other people, they stoke the fire. Fires stoked, wounds are deep, and memories are long. Separation occurs and other problems are generated.
Remove the wood from the fire, the fire dies, and the problems begin to move toward a resolution. Maybe not on its own, but certainly not if wood is thrown on the fire.