message: Wait for root channel on 2nd load
diff: @@ -17,6 +17,8 @@ export class Document extends EventEmitter implements IDocument {
  root = runtime.createChannel(rootMapId, MapExtension.Type) as IMap;
  root.attach();
  root.set("clicks", 0);
  + } else {
  + root = await runtime.getChannel(rootMapId) as IMap;
  }
  const document = new Document(runtime, root);
  