fix

src/execution/execute.js

@@ -1783,16 +1783,6 @@ export class Dispatcher {
 
           resolved = true;
 
-          if (this._isDone) {
-            resolve({
-              value: {
-                hasNext: false,
-              },
-              done: false,
-            });
-            return;
-          }
-
           if (this._subsequentPayloads.length === 0) {
             // a different call to next has exhausted all payloads
             resolve({ value: undefined, done: true });
@@ -1820,6 +1810,11 @@ export class Dispatcher {
               done: false
             });
             return;
+          } else if (done) {
+            // async iterable resolver just finished but there are pending payloads
+            // return the next one
+            resolve(this._race());
+            return
           }
 
           const returnValue: ExecutionPatchResult = {