Fix bug

Author: pythongosssss

api_server/services/terminal_service.py

@@ -38,7 +38,7 @@ def send_messages(self, entries):
 
         new_size = self.update_size()
 
-        for client_id in self.subscriptions:
+        for client_id in self.subscriptions.copy(): # prevent: Set changed size during iteration
             if client_id not in self.server.sockets:
                 # Automatically unsub if the socket has disconnected
                 self.unsubscribe(client_id)