fix strict egress detetermination

backend/src/utilities/packet_tracker.py

@@ -123,7 +123,7 @@ def _bridge_af_packet_observation_path(
         (
             item
             for item in egress_candidates
-            if item.get("iface") != ingress_iface and _parse_observation_timestamp(item.get("timestamp")) >= ingress_ts
+            if item.get("iface") != ingress_iface
         ),
         None,
     )
@@ -138,8 +138,19 @@ def _bridge_af_packet_observation_path(
         ),
         None,
     )
+    if fallback_egress is not None:
         return ingress_observation, fallback_egress
 
+    last_resort_egress = next(
+        (
+            item
+            for item in observations
+            if item.get("iface") != ingress_iface
+        ),
+        None,
+    )
+    return ingress_observation, last_resort_egress
+
 
 class PacketTracker:
     """Deduplicate packet observations and persist one upserted row per packet."""