Fixed #8184

core/src/mindustry/core/Logic.java

@@ -383,7 +383,12 @@ public class Logic implements ApplicationListener{
     public static void researched(Content content){
         if(!(content instanceof UnlockableContent u)) return;
 
+        boolean was = !u.unlockedNow();
         state.rules.researched.add(u.name);
+
+        if(!was){
+            Events.fire(new UnlockEvent(u));
+        }
     }
 
     @Override

core/src/mindustry/ui/dialogs/ResearchDialog.java

@@ -177,6 +177,15 @@ public class ResearchDialog extends BaseDialog{
         });
     }
 
+    @Override
+    public Dialog show(){
+        if(net.client()){
+            ui.showInfo("@research.multiplayer");
+            return this;
+        }
+        return show(Core.scene);
+    }
+
     void checkMargin(){
         if(Core.graphics.isPortrait() && showTechSelect){
             itemDisplay.marginTop(60f);