diff --git a/x2-data-explorer/src/main/java/com/github/rcd47/x2data/explorer/file/HistoryFileReader.java b/x2-data-explorer/src/main/java/com/github/rcd47/x2data/explorer/file/HistoryFileReader.java
index a4b1f3f..4b042c3 100644
--- a/x2-data-explorer/src/main/java/com/github/rcd47/x2data/explorer/file/HistoryFileReader.java
+++ b/x2-data-explorer/src/main/java/com/github/rcd47/x2data/explorer/file/HistoryFileReader.java
@@ -187,7 +187,7 @@ public HistoryFile read(FileChannel in, DoubleConsumer progressPercentCallback,
 					
 					var hotMapUpdates = objectsChangedInFrame.get(i);
 					if (hotMapUpdates.isEmpty()) {
-						frame.setObjectsHot(stateObjectsInFrameHot);
+						frame.setObjectsHot(parsedFrames[i - 1].getObjectsHot());
 					} else {
 						for (var changedObject : hotMapUpdates) {
 							stateObjectsInFrameHot.put(changedObject.getObjectId(), changedObject);
diff --git a/x2-data-explorer/src/main/java/com/github/rcd47/x2data/explorer/file/HistoryFrame.java b/x2-data-explorer/src/main/java/com/github/rcd47/x2data/explorer/file/HistoryFrame.java
index bbfa069..89268b6 100644
--- a/x2-data-explorer/src/main/java/com/github/rcd47/x2data/explorer/file/HistoryFrame.java
+++ b/x2-data-explorer/src/main/java/com/github/rcd47/x2data/explorer/file/HistoryFrame.java
@@ -36,6 +36,10 @@ public void setObjectsCold(Int2ReferenceOpenHashMap<GameStateObject> objectsCold
 		this.objectsCold = objectsCold;
 	}
 
+	public Int2ReferenceOpenHashMap<GameStateObject> getObjectsHot() {
+		return objectsHot;
+	}
+
 	public void setObjectsHot(Int2ReferenceOpenHashMap<GameStateObject> objectsHot) {
 		this.objectsHot = objectsHot;
 	}