# UNDF: UNDF-2026-000000924
--- a/electrum/lnworker.py
+++ b/electrum/lnworker.py
@@ -3029,10 +3029,8 @@ class LNWallet(LNWorker):
     def is_forwarded_htlc(self, htlc_key) -> Optional[str]:
         """Returns whether this was a forwarded HTLC."""
-        for payment_key, htlcs in self.active_forwardings.items():
-            if htlc_key in htlcs:
-                return payment_key
-        return None
+        return self._htlc_to_forwarding.get(htlc_key)

     def notify_upstream_peer(self, htlc_key: str) -> None: