Liveview Telemetry events in Production Environment

Hello Phoenix World!

I have a very strange problem. On my dev environment, I am able to capture the [:phoenix, :live_view, :handle_params, :stop] event and process them.

However when it goes into prod environment, none of the live_view events seems to be emitted.

What am I missing?

Best regardS
Terry

  def setup do
    :telemetry.attach_many(
      "telemetry-page",
      # Add patterns for libraries you want to debug
      [
        [:phoenix, :endpoint, :stop],
        [:phoenix, :live_view, :handle_params, :stop]
      ],
      &__MODULE__.handle_event/4,
      nil
    )
  end

  def handle_event(event, measurements, metadata, _config) do
    case event do
      [:phoenix, :live_view, :handle_params, :stop] ->
        %{socket: socket, params: query_params} = metadata