fix mods receiving their own broadcasts

docs/release-notes.md

@@ -1,6 +1,9 @@
 ← [README](README.md)
 
 # Release notes
+## Upcoming release
+* Fixed mods receiving their own message broadcasts.
+
 ## 3.3.1
 Released 22 February 2020 for Stardew Valley 1.4.1 or later.
 

src/SMAPI/Framework/SGame.cs

@@ -226,8 +226,12 @@ namespace StardewModdingAPI.Framework
         /// <param name="message">The message to deliver to applicable mods.</param>
         private void OnModMessageReceived(ModMessageModel message)
         {
-            // raise events for applicable mods
+            // get mod IDs to notify
             HashSet<string> modIDs = new HashSet<string>(message.ToModIDs ?? this.ModRegistry.GetAll().Select(p => p.Manifest.UniqueID), StringComparer.InvariantCultureIgnoreCase);
+            if (message.FromPlayerID == Game1.player?.UniqueMultiplayerID)
+                modIDs.Remove(message.FromModID); // don't send a broadcast back to the sender
+
+            // raise events
             this.Events.ModMessageReceived.RaiseForMods(new ModMessageReceivedEventArgs(message), mod => mod != null && modIDs.Contains(mod.Manifest.UniqueID));
         }