diff --git a/frontend/common/PlutoConnection.js b/frontend/common/PlutoConnection.js
index 8cacfd617a..e6735b1bbe 100644
--- a/frontend/common/PlutoConnection.js
+++ b/frontend/common/PlutoConnection.js
@@ -108,6 +108,7 @@ const create_ws_connection = (address, { on_message, on_socket_close }, timeout_
 
         const send_encoded = (message) => {
             const encoded = pack(message)
+            if (socket.readyState === WebSocket.CLOSED || socket.readyState === WebSocket.CLOSING) throw new Error("Socket is closed")
             socket.send(encoded)
         }
 
@@ -266,7 +267,7 @@ const default_ws_address = () => ws_address_from_base(window.location.href)
  *
  * @param {{
  *  on_unrequested_update: (message: PlutoMessage, by_me: boolean) => void,
- *  on_reconnect: () => boolean,
+ *  on_reconnect: () => Promise<boolean>,
  *  on_connection_status: (connection_status: boolean, hopeless: boolean) => void,
  *  connect_metadata?: Object,
  *  ws_address?: String,
@@ -377,7 +378,7 @@ export const create_pluto_connection = async ({
                     await connect() // reconnect!
 
                     console.log(`Starting state sync`, new Date().toLocaleTimeString())
-                    const accept = on_reconnect()
+                    const accept = await on_reconnect()
                     console.log(`State sync ${accept ? "" : "not "}successful`, new Date().toLocaleTimeString())
                     on_connection_status(accept, false)
                     if (!accept) {
diff --git a/frontend/components/Editor.js b/frontend/components/Editor.js
index 85935512bd..b1a705eedd 100644
--- a/frontend/components/Editor.js
+++ b/frontend/components/Editor.js
@@ -861,7 +861,6 @@ patch: ${JSON.stringify(
                 backend_launch_phase: this.state.backend_launch_phase == null ? null : BackendLaunchPhase.ready,
             })
 
-            // TODO Do this from julia itself
             this.client.send("complete", { query: "sq" }, { notebook_id: this.state.notebook.notebook_id })
             this.client.send("complete", { query: "\\sq" }, { notebook_id: this.state.notebook.notebook_id })
 
@@ -893,9 +892,18 @@ patch: ${JSON.stringify(
             }
         }
 
-        const on_reconnect = () => {
+        const on_reconnect = async () => {
             console.warn("Reconnected! Checking states")
 
+            await this.client.send(
+                "reset_shared_state",
+                {},
+                {
+                    notebook_id: this.state.notebook.notebook_id,
+                },
+                false
+            )
+
             return true
         }
 
diff --git a/frontend/components/welcome/Welcome.js b/frontend/components/welcome/Welcome.js
index f836db7cd7..2f2c20acf8 100644
--- a/frontend/components/welcome/Welcome.js
+++ b/frontend/components/welcome/Welcome.js
@@ -68,7 +68,7 @@ export const Welcome = ({ launch_params }) => {
         const client_promise = create_pluto_connection({
             on_unrequested_update: on_update,
             on_connection_status: on_connection_status,
-            on_reconnect: () => true,
+            on_reconnect: async () => true,
             ws_address: launch_params.pluto_server_url ? ws_address_from_base(launch_params.pluto_server_url) : undefined,
         })
         client_promise.then(async (client) => {
diff --git a/src/evaluation/Throttled.jl b/src/evaluation/Throttled.jl
index ecb6b5c4d0..a481069f30 100644
--- a/src/evaluation/Throttled.jl
+++ b/src/evaluation/Throttled.jl
@@ -63,10 +63,11 @@ This throttle is 'leading' and has some other properties that are specifically d
 Inspired by FluxML
 See: https://github.com/FluxML/Flux.jl/blob/8afedcd6723112ff611555e350a8c84f4e1ad686/src/utils.jl#L662
 """
-function throttled(f::Function, timeout::Real)
+function throttled(f::Function, timeout::Real; runtime_multiplier::Float64=0.0)
     tlock = ReentrantLock()
     iscoolnow = Ref(false)
     run_later = Ref(false)
+    last_runtime = Ref(0.0)
 
     tf = ThrottledFunction(f, timeout, runtime_multiplier, tlock, iscoolnow, run_later, last_runtime)
     
diff --git a/src/runner/PlutoRunner/src/PlutoRunner.jl b/src/runner/PlutoRunner/src/PlutoRunner.jl
index 2a8cf72690..dbf52ac55d 100644
--- a/src/runner/PlutoRunner/src/PlutoRunner.jl
+++ b/src/runner/PlutoRunner/src/PlutoRunner.jl
@@ -17,6 +17,10 @@
 # loaded on a runner process, which is something that we might want to change
 # in the future.
 
+# DEVELOPMENT TIP
+# If you are editing this file, you cannot use Revise unfortunately.
+# However! You don't need to restart Pluto to test your changes! You just need to restart the notebook from the Pluto main menu, and the new PlutoRunner.jl will be loaded.
+
 module PlutoRunner
 
 # import these two so that they can be imported from Main on the worker process if it launches without the stdlibs in its LOAD_PATH
diff --git a/src/webserver/WebServer.jl b/src/webserver/WebServer.jl
index a632fc685a..dbbfded50d 100644
--- a/src/webserver/WebServer.jl
+++ b/src/webserver/WebServer.jl
@@ -206,6 +206,7 @@ function run!(session::ServerSession)
                         if HTTP.WebSockets.isclosed(clientstream)
                             return
                         end
+                        found_client_id_ref = Ref(Symbol(:none))
                         try
                             for message in clientstream
                                 # This stream contains data received over the WebSocket.
@@ -221,6 +222,9 @@ function run!(session::ServerSession)
                                     end
                                     
                                     did_read = true
+                                    if found_client_id_ref[] === :none
+                                        found_client_id_ref[] = Symbol(parentbody["client_id"])
+                                    end
                                     process_ws_message(session, parentbody, clientstream)
                                 catch ex
                                     if ex isa InterruptException || ex isa HTTP.WebSockets.WebSocketError || ex isa EOFError
@@ -242,6 +246,11 @@ function run!(session::ServerSession)
                                 bt = stacktrace(catch_backtrace())
                                 @warn "Reading WebSocket client stream failed for unknown reason:" exception = (ex, bt)
                             end
+                        finally
+                            if haskey(session.connected_clients, found_client_id_ref[])
+                                @debug "Removing client $(found_client_id_ref[]) from connected_clients"
+                                delete!(session.connected_clients, found_client_id_ref[])
+                            end
                         end
                     end
                 catch ex
@@ -379,7 +388,7 @@ end
 "All messages sent over the WebSocket get decoded+deserialized and end up here."
 function process_ws_message(session::ServerSession, parentbody::Dict, clientstream)
     client_id = Symbol(parentbody["client_id"])
-    client = get!(session.connected_clients, client_id ) do 
+    client = get!(session.connected_clients, client_id) do 
         ClientSession(client_id, clientstream, session.options.server.simulated_lag)
     end
     client.stream = clientstream # it might change when the same client reconnects
diff --git a/test/Throttled.jl b/test/Throttled.jl
index 385ff61b43..b04c9e2732 100644
--- a/test/Throttled.jl
+++ b/test/Throttled.jl
@@ -20,9 +20,14 @@ using Pluto.WorkspaceManager: poll
     # we have an initial cooldown period in which f should not fire...
     # ...so x is still 1...
     @test x[] == 1
-    sleep(2dt)
+    sleep(1.5dt)
     # ...but after a delay, the call should go through.
     @test x[] == 2
+    
+    # Let's wait for the cooldown period to end
+    sleep(dt)
+    # nothing should have changed
+    @test x[] == 2
 
     # sleep(0) ## ASYNC MAGIC :(