Keep detection attempt counters and network fixtures group-aware

src/routing_layer/nat_detection.c

@@ -1060,9 +1060,9 @@ static void owner_start(struct nat_socket *state) {
         state->using_fallback = 0; state->prefer_fresh = 1;
     }
     history_load(state);
-    if (select_pair(state)) { owner_finish(state, state->reason); return; }
     if (random_id(&state->round)) { owner_finish(state, NAT_REASON_SEND_ERROR); return; }
     state->rounds++;
+    if (select_pair(state)) { owner_finish(state, state->reason); return; }
     memset(&state->helper_seen, 0, sizeof(state->helper_seen)); memset(&state->alternate_seen, 0, sizeof(state->alternate_seen));
     state->retries = 0; state->pre_received = 0; state->post_received = 0; state->filter_clean = 0; state->pre_healthy = 0;
     state->deadline = get_time_tb() + NAT_ROUND_TB; state->reason = NAT_REASON_NONE;