diff --git a/commons/src/main/java/com/powsybl/dynawo/commons/NetworkResultsUpdater.java b/commons/src/main/java/com/powsybl/dynawo/commons/NetworkResultsUpdater.java
index d344f3436..1957632ee 100644
--- a/commons/src/main/java/com/powsybl/dynawo/commons/NetworkResultsUpdater.java
+++ b/commons/src/main/java/com/powsybl/dynawo/commons/NetworkResultsUpdater.java
@@ -149,8 +149,9 @@ private static void updateLoads(Network targetNetwork, Network sourceNetwork, bo
                 update(targetNetwork.getLoad(sourceLoad.getId()).getTerminal(), sourceLoad.getTerminal());
             }
         } else {
+            Map<String, Bus> sourceBusesById = sourceNetwork.getBusBreakerView().getBusStream().collect(Collectors.toMap(Identifiable::getId, Function.identity()));
             for (Bus busTarget : targetNetwork.getBusBreakerView().getBuses()) {
-                updateLoads(busTarget, sourceNetwork.getBusBreakerView().getBus(busTarget.getId()));
+                updateLoads(busTarget, sourceBusesById.get(busTarget.getId()));
             }
         }
     }