diff --git a/app/react-components/ui.jsx b/app/react-components/ui.jsx
index 65e7b84..a2980e6 100644
--- a/app/react-components/ui.jsx
+++ b/app/react-components/ui.jsx
@@ -241,8 +241,9 @@ export default function Ui({disconnected}) {
     });
   }, [chatIsOpen, client, debug, devtoolsIsOpen, monopolizers, setDebug, setScale]);
   usePacket('EcsChange', async () => {
-    setMainEntity(undefined);
     setEcs(new ClientEcs({Components, Systems}));
+    setMainEntity(undefined);
+    setMonopolizers([]);
   }, [Components, Systems, setEcs, setMainEntity]);
   usePacket('Tick', async (payload, client) => {
     if (0 === Object.keys(payload.ecs).length) {