diff --git a/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/show/StoredRecords.java b/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/show/StoredRecords.java
index 16601bdf..ce90aad7 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/show/StoredRecords.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/show/StoredRecords.java
@@ -105,6 +105,12 @@ public class StoredRecords {
                 .computeIfAbsent(p, k -> new ArrayList<>());
         if (tntRecords.contains(tntRecord)) {
             tntRecords.remove(tntRecord);
+            if (tntRecords.isEmpty()) {
+                isolatedTNT.get(tntRecord.getRegion()).remove(p);
+                if (isolatedTNT.get(tntRecord.getRegion()).isEmpty()) {
+                    isolatedTNT.remove(tntRecord.getRegion());
+                }
+            }
         } else {
             tntRecords.add(tntRecord);
         }