diff --git a/client/src/main/java/ctbrec/ui/tabs/ThumbOverviewTab.java b/client/src/main/java/ctbrec/ui/tabs/ThumbOverviewTab.java
index ca4a58a9..db2dfa29 100644
--- a/client/src/main/java/ctbrec/ui/tabs/ThumbOverviewTab.java
+++ b/client/src/main/java/ctbrec/ui/tabs/ThumbOverviewTab.java
@@ -827,10 +827,13 @@ public class ThumbOverviewTab extends Tab implements TabSelectionListener {
         List<ThumbCell> thumbsToMove = new ArrayList<>();
         ObservableList<Node> thumbs = grid.getChildren();
         for (int i = thumbs.size()-1; i >= 0; i--) {
-            ThumbCell thumb = (ThumbCell) thumbs.get(i);
-            if(recorder.isTracked(thumb.getModel())) {
-                thumbs.remove(i);
-                thumbsToMove.add(0, thumb);
+            Node node = thumbs.get(i);
+            if(node instanceof ThumbCell) {
+                ThumbCell thumb = (ThumbCell) thumbs.get(i);
+                if(recorder.isTracked(thumb.getModel())) {
+                    thumbs.remove(i);
+                    thumbsToMove.add(0, thumb);
+                }
             }
         }
         thumbs.addAll(0, thumbsToMove);