message: Fix the failure of missing session when multiple mutations are nested within an operation
diff: @@ -71,6 +71,7 @@ export function apolloSchemaCreator({
  if (--sessions[ctx[CONTEXT_ID]].count === 0) {
  destroy();
  delete sessions[ctx[CONTEXT_ID]];
  + delete ctx[CONTEXT_ID];
  }
  },
  },
  