Coming back to this, I wanted to share that there are other options worth exploring that don’t involve a separate (sticky) LiveView.
For instance, one can save the open/close state on the client using localStorage and then pass it as params to the LiveSocket, see the example in the docs at Phoenix.LiveView.get_connect_params/1.
For a collection of this and other techniques, there’s a talk from ElixirConf EU 2025: Phoenix LiveView: Mastering Reconnects for a Seamless User Experience -Giovanni Francischelli.
