Fixed #2654 / Fixed #2651 / fine I'll add a base

core/src/mindustry/ui/fragments/ChatFragment.java

@@ -227,6 +227,7 @@ public class ChatFragment extends Table{
     }
 
     public void addMessage(String message, String sender){
+        if(sender == null && message == null) return;
         messages.insert(0, new ChatMessage(message, sender));
 
         fadetime += 1f;
@@ -244,7 +245,7 @@ public class ChatFragment extends Table{
             this.message = message;
             this.sender = sender;
             if(sender == null){ //no sender, this is a server message?
-                formattedMessage = message;
+                formattedMessage = message == null ? "" : message;
             }else{
                 formattedMessage = "[coral][[" + sender + "[coral]]:[white] " + message;
             }