diff --git a/scripts/src/hwlab-node-web-sentinel-cicd.ts b/scripts/src/hwlab-node-web-sentinel-cicd.ts
index c7a2a7f5..fe26b6f1 100644
--- a/scripts/src/hwlab-node-web-sentinel-cicd.ts
+++ b/scripts/src/hwlab-node-web-sentinel-cicd.ts
@@ -1442,6 +1442,17 @@ function finalizeQuickVerifyFailure(state: SentinelCicdState, input: {
   readonly warnings?: readonly unknown[];
 }): Record<string, unknown> {
   const cleanupSteps: Record<string, unknown>[] = [];
+  if (input.promptIndex > 0) {
+    const cancel = runChildCli([
+      "hwlab", "nodes", "web-probe", "observe", "command", input.observerId,
+      "--node", state.spec.nodeId,
+      "--lane", state.spec.lane,
+      "--type", "cancel",
+      "--wait-ms", "55000",
+      "--command-timeout-seconds", "55",
+    ], 60);
+    cleanupSteps.push({ phase: "observe-cancel-after-failure", ok: cancel.ok, result: cancel.result });
+  }
   const stop = runChildCli([
     "hwlab", "nodes", "web-probe", "observe", "stop", input.observerId,
     "--node", state.spec.nodeId,