diff --git a/.changeset/reject-decision-one-dialog.md b/.changeset/reject-decision-one-dialog.md
new file mode 100644
index 0000000000..9b62f3cb9b
--- /dev/null
+++ b/.changeset/reject-decision-one-dialog.md
@@ -0,0 +1,22 @@
+---
+"@object-ui/app-shell": patch
+---
+
+fix(approvals): record-header Reject fires after ONE dialog again (objectui#3126)
+
+Since #2961 made the record header's decision inputs live (`actionParams`),
+the Reject action carried BOTH `confirmText` and a collectable comment param.
+The ActionRunner chains confirmation before param collection, so rejecting
+queued two dialogs: the approver answered "Reject this approval request? →
+Continue", the alertdialog closed — and no request fired, because it was
+waiting on a second, unexpected "Action parameters / Comment (optional)"
+dialog. Anyone on the rc.0 contract (one confirm → request) read that as a
+silent no-op: zero network traffic, no toast, the flow stuck pending. Approve
+never declared `confirmText`, which is why it kept working on the same node.
+
+The Reject action no longer declares `confirmText`. The param dialog is the
+confirmation surface: it is titled by the action ("Reject"), carries the old
+confirm question as its description (same `approvals.rejectConfirm` i18n key,
+so every locale keeps its translation), collects the optional comment and any
+declared decision outputs, and nothing is sent until its own Confirm — one
+decision, one dialog, matching Approve and the Approval Center.
diff --git a/packages/app-shell/src/views/RecordDetailView.approvalDecisionActions.test.tsx b/packages/app-shell/src/views/RecordDetailView.approvalDecisionActions.test.tsx
index 164299c4a1..d57210d87b 100644
--- a/packages/app-shell/src/views/RecordDetailView.approvalDecisionActions.test.tsx
+++ b/packages/app-shell/src/views/RecordDetailView.approvalDecisionActions.test.tsx
@@ -56,7 +56,22 @@ describe('buildApprovalDecisionActions — param key (objectui#2955)', () => {
     const actions = byName(buildApprovalDecisionActions(pending(), t) as any[]);
     expect(actions.approve_request.order).toBe(-100);
     expect(actions.reject_request.order).toBe(-99);
-    expect(actions.reject_request.confirmText).toBeDefined();
+  });
+});
+
+describe('buildApprovalDecisionActions — one dialog per decision (objectui#3126)', () => {
+  it('never carries `confirmText` — the param dialog is the confirmation', () => {
+    // The runner chains confirm THEN param collection, so `confirmText` +
+    // `actionParams` queued TWO dialogs: after "Continue" nothing was sent
+    // until a second, unexpected comment dialog was also confirmed — the
+    // #3126 "reject silently does nothing" report. One decision, one dialog.
+    const actions = buildApprovalDecisionActions(pending(), t) as any[];
+    for (const a of actions) expect(a.confirmText).toBeUndefined();
+  });
+
+  it('keeps the reject confirm question as the dialog description', () => {
+    const actions = byName(buildApprovalDecisionActions(pending(), t) as any[]);
+    expect(actions.reject_request.description).toBe('Reject this approval request?');
   });
 });
 
diff --git a/packages/app-shell/src/views/RecordDetailView.tsx b/packages/app-shell/src/views/RecordDetailView.tsx
index 308b396c7c..c7d77a519b 100644
--- a/packages/app-shell/src/views/RecordDetailView.tsx
+++ b/packages/app-shell/src/views/RecordDetailView.tsx
@@ -228,7 +228,15 @@ export function buildApprovalDecisionActions(
       order: -99,
       locations: ['record_header'],
       refreshAfter: true,
-      confirmText: t('approvals.rejectConfirm', { defaultValue: 'Reject this approval request?' }),
+      // NO `confirmText` here (objectui#3126). The runner chains confirm THEN
+      // param collection, so carrying both queued two dialogs: the approver
+      // answered "Reject this approval request? → Continue" and the request
+      // still didn't fire — it waited on a second, unexpected comment dialog
+      // (opened since #2961 made `actionParams` live on this surface), which
+      // reads as a silent no-op. The param dialog IS the confirmation: it is
+      // titled by this label, carries the confirm question as its description,
+      // and nothing is sent until its own Confirm.
+      description: t('approvals.rejectConfirm', { defaultValue: 'Reject this approval request?' }),
       actionParams: decisionParams('reject'),
       successMessage: t('approvals.rejectSuccess', { defaultValue: 'Rejected' }),
     },