Need a lock on the list as we update it between threads

sig/App.java

@@ -394,7 +394,8 @@ class Server
                 @Override
                 public void run() {
                     while (true){
-                        for (String command:commandQueue){
+                        synchronized (commandQueue){
+                            commandQueue.forEach((command)->{
                                 switch (command){
                                     case "FOLLOW":{
                                         PressKeyWithModifier(KeyEvent.VK_CONTROL,KeyEvent.VK_7);
@@ -453,8 +454,9 @@ class Server
                                         System.out.println("Unknown command: "+command);
                                     }
                                 }
-                        }
+                            });
                             commandQueue.clear();
+                        }
 
                         if (queueUpSprint&&nextActionTimer==0){
                             PressKey(KeyEvent.VK_N);