attempt to resolve chatter problems

src/application/main-window.vala

@@ -39,10 +39,12 @@ public class MainWindow : Adw.ApplicationWindow
         if (conversation_guid == null) {
             transcript_view.message_list.model = null;
         } else {
+            if (transcript_view.message_list.model == null || transcript_view.message_list.model.conversation_guid != conversation_guid) {
                 transcript_view.message_list.model = new MessageListModel (conversation_guid);
                 Repository.get_instance().sync_conversation(conversation_guid);
             }
         }
+    }
 
     private void on_transcript_send(string message) {
         if (transcript_view.message_list.model == null) {

src/message-list/message-layout.vala

@@ -131,8 +131,6 @@ private class MessageLayout : Object
 
     private void draw_background(Snapshot snapshot) 
     {
-        snapshot.save();
-
         var width = get_width();
         var height = get_height();
         var color = background_color;
@@ -152,17 +150,20 @@ private class MessageLayout : Object
         };
         
         snapshot.append_linear_gradient(bounds, start_point, end_point, stops);
-
-        snapshot.restore();
     }
 
     private void with_bubble_clip(Snapshot snapshot, Func<Snapshot> func) {
         var width = get_width();
         var height = get_height();
+
+        if (width > 10 && height > 10) {
             var path = create_bubble_path(width, height, from_me);
             snapshot.push_fill(path, Gsk.FillRule.WINDING);
             func(snapshot);
             snapshot.pop();
+        } else {
+            func(snapshot);
+        }
     }
 
     private Gsk.Path create_bubble_path(float width, float height, bool tail_on_right = false)