diff --git a/umap/static/umap/js/modules/schema.js b/umap/static/umap/js/modules/schema.js
index b7f5080f..07e520bb 100644
--- a/umap/static/umap/js/modules/schema.js
+++ b/umap/static/umap/js/modules/schema.js
@@ -313,7 +313,7 @@ export const SCHEMA = {
   },
   outlink: {
     type: String,
-    impacts: ['data'],
+    impacts: [],
     label: translate('Link to…'),
     helpEntries: 'outlink',
     placeholder: 'http://...',
@@ -321,7 +321,7 @@ export const SCHEMA = {
   },
   outlinkTarget: {
     type: String,
-    impacts: ['data'],
+    impacts: [],
     label: translate('Open link in…'),
     inheritable: true,
     default: 'blank',
@@ -511,6 +511,7 @@ export const SCHEMA = {
     label: translate('Default zoom level'),
     inheritable: true,
   },
+  // FIXME This is an internal Leaflet property, we might want to do this differently.
   _latlng: {
     type: Object,
     impacts: ['data'],
diff --git a/umap/static/umap/js/modules/sync/engine.js b/umap/static/umap/js/modules/sync/engine.js
index 7de5f662..70cc974c 100644
--- a/umap/static/umap/js/modules/sync/engine.js
+++ b/umap/static/umap/js/modules/sync/engine.js
@@ -4,7 +4,7 @@ import { MapUpdater, DataLayerUpdater, FeatureUpdater } from './updaters.js'
 export class SyncEngine {
   constructor(map) {
     this.map = map
-    this.receiver = new MessagesDispatcher(this.map)
+    this.dispatcher = new MessagesDispatcher(this.map)
     this._initialize()
   }
   _initialize() {
@@ -22,7 +22,7 @@ export class SyncEngine {
   }
 
   start(webSocketURI, authToken) {
-    this.transport = new WebSocketTransport(webSocketURI, authToken, this.receiver)
+    this.transport = new WebSocketTransport(webSocketURI, authToken, this.dispatcher)
     this.sender = new MessagesSender(this.transport)
     this.upsert = this.sender.upsert.bind(this.sender)
     this.update = this.sender.update.bind(this.sender)
diff --git a/umap/static/umap/js/modules/sync/updaters.js b/umap/static/umap/js/modules/sync/updaters.js
index b3c5abe1..2d5729e3 100644
--- a/umap/static/umap/js/modules/sync/updaters.js
+++ b/umap/static/umap/js/modules/sync/updaters.js
@@ -51,6 +51,7 @@ export class DataLayerUpdater extends BaseUpdater {
   upsert({ value }) {
     // Inserts does not happen (we use multiple updates instead).
     this.map.createDataLayer(value, false)
+    this.map.render()
   }
 
   update({ key, metadata, value }) {
@@ -60,14 +61,6 @@ export class DataLayerUpdater extends BaseUpdater {
   }
 }
 
-/**
- * This is an abstract base class
- * And needs to be subclassed to be used.
- *
- * The child classes need to expose:
- * - `featureClass`: the name of the class to create the feature
- * - `featureArgument`: an object with the properties to pass to the class when bulding it.
- **/
 export class FeatureUpdater extends BaseUpdater {
   getFeatureFromMetadata({ id, layerId }) {
     const datalayer = this.getDataLayerFromID(layerId)
@@ -79,16 +72,14 @@ export class FeatureUpdater extends BaseUpdater {
     let { id, layerId } = metadata
     const datalayer = this.getDataLayerFromID(layerId)
     let feature = this.getFeatureFromMetadata(metadata, value)
-    if (feature === undefined) {
-      console.log(`Unable to find feature with id = ${metadata.id}. Creating a new one`)
-    }
+
     feature = datalayer.geometryToFeature({
       geometry: value.geometry,
       geojson: value,
       id,
       feature,
     })
-    feature.addTo(datalayer)
+    datalayer.addLayer(feature)
   }
 
   // Update a property of an object
@@ -103,9 +94,9 @@ export class FeatureUpdater extends BaseUpdater {
         datalayer.geometryToFeature({ geometry: value, id: metadata.id, feature })
       default:
         this.updateObjectValue(feature, key, value)
+        feature.datalayer.indexProperties(feature)
     }
 
-    feature.datalayer.indexProperties(feature)
     feature.render([key])
   }
 
diff --git a/umap/views.py b/umap/views.py
index 2819d410..d3046281 100644
--- a/umap/views.py
+++ b/umap/views.py
@@ -792,23 +792,18 @@ def get_websocket_auth_token(request, map_id, map_inst):
     """
     map_object: Map = Map.objects.get(pk=map_id)
 
-    if map_object.can_edit(request.user, request):
-        permissions = ["edit"]
-        if map_object.is_owner(request.user, request):
-            permissions.append("owner")
+    permissions = ["edit"]
+    if map_object.is_owner(request.user, request):
+        permissions.append("owner")
 
-        if request.user.is_authenticated:
-            user = request.user.pk
-        else:
-            user = "anonymous"
-        signed_token = TimestampSigner().sign_object(
-            {"user": user, "map_id": map_id, "permissions": permissions}
-        )
-        return simple_json_response(token=signed_token)
+    if request.user.is_authenticated:
+        user = request.user.pk
     else:
-        return HttpResponseForbidden(
-            _("You cannot edit this map with your current permissions.")
-        )
+        user = "anonymous"
+    signed_token = TimestampSigner().sign_object(
+        {"user": user, "map_id": map_id, "permissions": permissions}
+    )
+    return simple_json_response(token=signed_token)
 
 
 class MapUpdate(FormLessEditMixin, PermissionsMixin, UpdateView):