diff --git a/src/main/java/cam72cam/immersiverailroading/entity/physics/Consist.java b/src/main/java/cam72cam/immersiverailroading/entity/physics/Consist.java
index 54c9cdffa..48b183a26 100644
--- a/src/main/java/cam72cam/immersiverailroading/entity/physics/Consist.java
+++ b/src/main/java/cam72cam/immersiverailroading/entity/physics/Consist.java
@@ -525,7 +525,7 @@ public static void iterate(Map<UUID, SimulationState> states, Map<UUID, Simulati
                 consist.forEach(p -> p.state.dirty = true);
             }
 
-            if (atRest) {
+            if (atRest && !dirty) {
                 // Copy existing states
                 for (Particle particle : consist) {
                     nextStateMap.put(particle.state.config.id, particle.state.next());