diff --git a/src/store/ref-resource.ts b/src/store/ref-resource.ts
index d6deb9f..6a3eba5 100644
--- a/src/store/ref-resource.ts
+++ b/src/store/ref-resource.ts
@@ -152,11 +152,27 @@ export default function useRefResource() {
                     if (result) {
                         return result.watermarked_video_url || result.marked_url;
                     }
+                    // DONE but task_result missing: query task details once to recover embedded url result.
+                    for (let i = doneTasks.length - 1; i >= 0; i--) {
+                        const doneTask = doneTasks[i];
+                        if (!doneTask.task_id) continue;
+                        const dbTask = await getTask(doneTask.task_id);
+                        if (!dbTask) continue;
+                        const recovered = get_task_result(dbTask);
+                        if (recovered) {
+                            doneTask.task_result = recovered as any;
+                            await request({url: "/api/v1/ws/update_ref_resource", method: "POST", data: resource});
+                            return (recovered as any).watermarked_video_url || (recovered as any).marked_url;
+                        }
+                    }
                 }
 
                 if (tsTasks.every(t => t.task_status === TaskStatuses.FAILED)) {
                     // retry
                     task_submitted = false;
+                } else if (tsTasks.every(t => isTaskFinished(t.task_status))) {
+                    // all finished but still no usable url -> allow re-submit watermark task
+                    task_submitted = false;
                 } else {
                     // read new status
                     let task_id = tsTasks.find(t => !isTaskFinished(t.task_status))?.task_id as string | undefined;