BauSystem_Main/src/de/steamwar/bausystem/features/tracer/Recorder.java

@@ -116,6 +116,7 @@ public class Recorder implements Listener {
         Trace trace = new Trace(region);
         noExplosionRecorded.add(trace);
         activeTraces.put(region, trace);
+        recordsToAddMap.put(trace, new ArrayList<>());
         return manager.add(trace);
     }
 
@@ -133,6 +134,7 @@ public class Recorder implements Listener {
         for(TNTPrimed tnt : trackedTNT.getOrDefault(region, Collections.emptyList()))
             historyMap.remove(tnt);
 
+        recordsToAddMap.remove(trace);
         trackedTNT.put(region, new ArrayList<>());
     }
 

BauSystem_Main/src/de/steamwar/bausystem/features/tracer/Trace.java

@@ -160,6 +160,11 @@ public class Trace {
 
         List<ViewFlag> flagList = new ArrayList<>();
 
+        //Manage required flags
+        for(ViewFlag flag: flags)
+            if(flag.required != null)
+                flagList.add(flag.required);
+
         //Manage inverse flags
         flagList.addAll(ViewFlag.inverseFlags);
         for(ViewFlag flag: flags){