diff --git a/src/workflow/internal/durabletask/worker/orchestration-executor.ts b/src/workflow/internal/durabletask/worker/orchestration-executor.ts
index f5ded10c..fcbf1aa5 100644
--- a/src/workflow/internal/durabletask/worker/orchestration-executor.ts
+++ b/src/workflow/internal/durabletask/worker/orchestration-executor.ts
@@ -67,6 +67,12 @@ export class OrchestrationExecutor {
 
       for (const oldEvent of oldEvents) {
         await this.processEvent(ctx, oldEvent);
+        // Stop replaying once the orchestration has completed (e.g. EVENTRAISED resolved a
+        // whenAny that caused the workflow to return).  Processing additional history events
+        // after completion can trigger spurious non-determinism errors (e.g. a TIMERCREATED
+        // confirmation that follows EVENTRAISED in the same batch) which would overwrite the
+        // correct COMPLETED status with a FAILED one and delay state visibility.
+        if (ctx._isComplete) break;
       }
 
       // Get new actions by executing newly received events into the orchestrator function
@@ -76,6 +82,11 @@ export class OrchestrationExecutor {
 
       for (const newEvent of newEvents) {
         await this.processEvent(ctx, newEvent);
+        // Same guard for new events: once complete, don't process further events in this
+        // batch.  This is the primary fix for issue #734 where TIMERCREATED arrives in the
+        // same new-events batch as EVENTRAISED and (when ordered after it) incorrectly fails
+        // the already-completed orchestration.
+        if (ctx._isComplete) break;
       }
     } catch (e: any) {
       ctx.setFailed(e);
diff --git a/test/e2e/helpers/CustomNodeEnvironment.cjs b/test/e2e/helpers/CustomNodeEnvironment.cjs
index 13f595b6..ca8ca8bc 100644
--- a/test/e2e/helpers/CustomNodeEnvironment.cjs
+++ b/test/e2e/helpers/CustomNodeEnvironment.cjs
@@ -12,7 +12,7 @@ limitations under the License.
 */
 
 // eslint-disable-next-line @typescript-eslint/no-require-imports
-const { TestEnvironment: NodeEnvironment } = require("jest-environment-node");
+const NodeEnvironment = require("jest-environment-node");
 
 /**
  * Custom Jest test environment that installs a filter on the process object
diff --git a/test/e2e/workflow/workflow.test.ts b/test/e2e/workflow/workflow.test.ts
index 4b1d41f0..0bfcaf53 100644
--- a/test/e2e/workflow/workflow.test.ts
+++ b/test/e2e/workflow/workflow.test.ts
@@ -414,6 +414,74 @@ describe("workflow", () => {
     expect(state?.serializedOutput).toEqual(JSON.stringify(16));
   }, 31000);
 
+  // Regression test for https://github.com/dapr/js-sdk/issues/734
+  //
+  // The bug: after a workflow completes via whenAny([externalEvent, timer]) where
+  // the external event arrives *after* a preceding activity has already finished,
+  // getWorkflowState() returns RUNNING indefinitely despite internal completion.
+  //
+  // Root cause: the event is delivered "live" to the waiting workflow (not buffered
+  // before waitForExternalEvent is registered), taking a code path that fails to
+  // flush the completed status back through the state store in a timely manner.
+  //
+  // This test will FAIL when the bug is present (getWorkflowState stays RUNNING for
+  // 10+ seconds) and PASS once the fix lands (status syncs within ~5 seconds).
+  it("should reflect COMPLETED in getWorkflowState after whenAny resolves via live external event following activity (issue #734)", async () => {
+    // A trivial activity that just echoes its input; enough to force the workflow
+    // through an activity step before reaching the whenAny yield point.
+    const setupActivity = async (_: WorkflowActivityContext, jobName: string) => {
+      return { jobName, status: "created" };
+    };
+
+    const workflow: TWorkflow = async function* (ctx: WorkflowContext, jobName: string): any {
+      // Step 1: run an activity so the whenAny tasks are created *after* at least
+      // one history replay round-trip.  This is the precondition that surfaces #734.
+      yield ctx.callActivity(setupActivity, jobName);
+
+      // Step 2: the problematic whenAny pattern from the issue
+      const eventTask = ctx.waitForExternalEvent("job-done");
+      const timerTask = ctx.createTimer(30); // long timeout so the event wins
+
+      const winner = yield ctx.whenAny([eventTask, timerTask]);
+
+      if (winner === eventTask) {
+        return "completed";
+      } else {
+        return "timeout";
+      }
+    };
+
+    workflowRuntime.registerWorkflow(workflow).registerActivity(setupActivity);
+    await workflowRuntime.start();
+
+    const id = await workflowClient.scheduleNewWorkflow(workflow, "test-job-734");
+
+    // Wait for the workflow to start and the activity to finish before we raise
+    // the event.  Raising it before waitForExternalEvent is registered causes Dapr
+    // to buffer the event (a different code path that does *not* reproduce #734).
+    await workflowClient.waitForWorkflowStart(id, false, 15);
+    // Extra headroom for the activity round-trip through the Dapr sidecar.
+    await new Promise((resolve) => setTimeout(resolve, 2000));
+
+    // Simulate the K8s job callback: raise the event *after* the workflow is
+    // already sitting at the whenAny yield point.
+    await workflowClient.raiseEvent(id, "job-done", { success: true });
+
+    // Poll getWorkflowState() directly — this is the API that the issue reports
+    // as stuck.  waitForWorkflowCompletion uses a server-side blocking RPC and
+    // would mask the bug; we intentionally use the snapshot query here.
+    const pollDeadlineMs = Date.now() + 8000; // 8 s: passes after fix, fails with bug
+    let lastState = await workflowClient.getWorkflowState(id, true);
+
+    while (Date.now() < pollDeadlineMs && lastState?.runtimeStatus !== WorkflowRuntimeStatus.COMPLETED) {
+      await new Promise((resolve) => setTimeout(resolve, 250));
+      lastState = await workflowClient.getWorkflowState(id, true);
+    }
+
+    expect(lastState?.runtimeStatus).toEqual(WorkflowRuntimeStatus.COMPLETED);
+    expect(lastState?.serializedOutput).toEqual(JSON.stringify("completed"));
+  }, 60000);
+
   it("should be able to purge orchestration by id", async () => {
     const plusOneActivity = async (_: WorkflowActivityContext, input: number) => {
       return input + 1;