diff --git a/packages/keychain/src/components/transaction/ConfirmTransaction.test.tsx b/packages/keychain/src/components/transaction/ConfirmTransaction.test.tsx
index 4631a174a2..ca9a50870c 100644
--- a/packages/keychain/src/components/transaction/ConfirmTransaction.test.tsx
+++ b/packages/keychain/src/components/transaction/ConfirmTransaction.test.tsx
@@ -159,6 +159,11 @@ describe("ConfirmTransaction", () => {
     await waitFor(() => {
       expect(screen.getAllByText("Account validation failed")).toHaveLength(2);
     });
+
+    // Submit errors must be propagated so caller promises can resolve/reject
+    await waitFor(() => {
+      expect(defaultProps.onError).toHaveBeenCalledWith(validationError);
+    });
   });
 
   it("skips session UI when skipSession is used", async () => {
diff --git a/packages/keychain/src/components/transaction/ConfirmTransaction.tsx b/packages/keychain/src/components/transaction/ConfirmTransaction.tsx
index aa5d91b93e..7d31c1bb70 100644
--- a/packages/keychain/src/components/transaction/ConfirmTransaction.tsx
+++ b/packages/keychain/src/components/transaction/ConfirmTransaction.tsx
@@ -81,6 +81,7 @@ export function ConfirmTransaction({
       const submitError = e as ControllerError;
       console.error("Transaction execution failed:", submitError);
       setError(submitError);
+      onError?.(submitError);
       toast.error("", {
         message: "Transaction execution failed",
         toastId,