diff --git a/src/backends/meta-screen-cast-stream-src.c b/src/backends/meta-screen-cast-stream-src.c
index e801324f0..e86f9a2b7 100644
--- a/src/backends/meta-screen-cast-stream-src.c
+++ b/src/backends/meta-screen-cast-stream-src.c
@@ -1213,7 +1213,8 @@ create_pipewire_source (MetaScreenCastStreamSrc *src)
                         G_IO_IN | G_IO_ERR);
 
   pw_loop_enter (pipewire_source->pipewire_loop);
-  g_source_attach (&pipewire_source->base, NULL);
+  g_source_attach (source, NULL);
+  g_source_unref (source);
 
   return pipewire_source;
 }
@@ -1285,7 +1286,7 @@ meta_screen_cast_stream_src_get_stream (MetaScreenCastStreamSrc *src)
 }
 
 static void
-meta_screen_cast_stream_src_finalize (GObject *object)
+meta_screen_cast_stream_src_dispose (GObject *object)
 {
   MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (object);
   MetaScreenCastStreamSrcPrivate *priv =
@@ -1298,10 +1299,9 @@ meta_screen_cast_stream_src_finalize (GObject *object)
   g_clear_pointer (&priv->dmabuf_handles, g_hash_table_destroy);
   g_clear_pointer (&priv->pipewire_core, pw_core_disconnect);
   g_clear_pointer (&priv->pipewire_context, pw_context_destroy);
-  g_source_destroy (&priv->pipewire_source->base);
-  g_source_unref (&priv->pipewire_source->base);
+  g_clear_pointer ((GSource **) &priv->pipewire_source, g_source_destroy);
 
-  G_OBJECT_CLASS (meta_screen_cast_stream_src_parent_class)->finalize (object);
+  G_OBJECT_CLASS (meta_screen_cast_stream_src_parent_class)->dispose (object);
 }
 
 static void
@@ -1360,7 +1360,7 @@ meta_screen_cast_stream_src_class_init (MetaScreenCastStreamSrcClass *klass)
 {
   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 
-  object_class->finalize = meta_screen_cast_stream_src_finalize;
+  object_class->dispose = meta_screen_cast_stream_src_dispose;
   object_class->set_property = meta_screen_cast_stream_src_set_property;
   object_class->get_property = meta_screen_cast_stream_src_get_property;
 
diff --git a/src/backends/meta-screen-cast-virtual-stream-src.c b/src/backends/meta-screen-cast-virtual-stream-src.c
index 47a917da9..3341aedd9 100644
--- a/src/backends/meta-screen-cast-virtual-stream-src.c
+++ b/src/backends/meta-screen-cast-virtual-stream-src.c
@@ -312,8 +312,6 @@ meta_screen_cast_virtual_stream_src_disable (MetaScreenCastStreamSrc *src)
     case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
       break;
     }
-
-  g_clear_object (&virtual_src->virtual_monitor);
 }
 
 static gboolean
@@ -526,12 +524,20 @@ ensure_virtual_monitor (MetaScreenCastVirtualStreamSrc *virtual_src,
       MetaCrtcMode *crtc_mode =
         meta_virtual_monitor_get_crtc_mode (virtual_monitor);
       const MetaCrtcModeInfo *mode_info = meta_crtc_mode_get_info (crtc_mode);
+      float refresh_rate;
 
       if (mode_info->width == video_format->size.width &&
           mode_info->height == video_format->size.height)
         return;
 
-      g_clear_object (&virtual_src->virtual_monitor);
+      refresh_rate = ((float) video_format->max_framerate.num /
+                      video_format->max_framerate.denom);
+      meta_virtual_monitor_set_mode (virtual_monitor,
+                                     video_format->size.width,
+                                     video_format->size.height,
+                                     refresh_rate);
+      meta_monitor_manager_reload (monitor_manager);
+      return;
     }
 
   virtual_monitor = create_virtual_monitor (virtual_src, video_format, &error);
@@ -585,6 +591,19 @@ hw_cursor_inhibitor_iface_init (MetaHwCursorInhibitorInterface *iface)
     meta_screen_cast_virtual_stream_src_is_cursor_inhibited;
 }
 
+static void
+meta_screen_cast_virtual_stream_src_dispose (GObject *object)
+{
+  MetaScreenCastVirtualStreamSrc *virtual_src =
+    META_SCREEN_CAST_VIRTUAL_STREAM_SRC (object);
+  GObjectClass *parent_class =
+    G_OBJECT_CLASS (meta_screen_cast_virtual_stream_src_parent_class);
+
+  parent_class->dispose (object);
+
+  g_clear_object (&virtual_src->virtual_monitor);
+}
+
 static void
 meta_screen_cast_virtual_stream_src_init (MetaScreenCastVirtualStreamSrc *virtual_src)
 {
@@ -593,9 +612,12 @@ meta_screen_cast_virtual_stream_src_init (MetaScreenCastVirtualStreamSrc *virtua
 static void
 meta_screen_cast_virtual_stream_src_class_init (MetaScreenCastVirtualStreamSrcClass *klass)
 {
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
   MetaScreenCastStreamSrcClass *src_class =
     META_SCREEN_CAST_STREAM_SRC_CLASS (klass);
 
+  object_class->dispose = meta_screen_cast_virtual_stream_src_dispose;
+
   src_class->get_specs = meta_screen_cast_virtual_stream_src_get_specs;
   src_class->enable = meta_screen_cast_virtual_stream_src_enable;
   src_class->disable = meta_screen_cast_virtual_stream_src_disable;