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

@@ -132,6 +132,11 @@ public class TraceManager implements Listener {
      * @param trace the trace to be removed
      */
     public boolean remove(Trace trace) {
+        Optional<Trace> activeTrace = TraceRecorder.instance.getActiveTraceForRegion(trace.getRegion());
+        if (activeTrace.isPresent() && activeTrace.get() == trace) {
+            TraceRecorder.instance.stopRecording(trace.getRegion());
+        }
+
         Map<Integer, Trace> traces = tracesByRegion.getOrDefault(trace.getRegion(), Collections.emptyMap());
         Integer traceId = traces.entrySet().stream()
                 .filter(entry -> entry.getValue() == trace)
@@ -148,6 +153,7 @@ public class TraceManager implements Listener {
      * Clears all traces
      */
     public void clear(Region region) {
+        TraceRecorder.instance.stopRecording(region);
         showDataPerRegionPerPlayer.getOrDefault(region, new HashMap<>())
                 .keySet()
                 .forEach(player -> {

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

@@ -185,6 +185,22 @@ public class TraceRecorder implements Listener {
         return activeTraces.containsKey(region);
     }
 
+    /**
+     * Get the trace that is currently recorded in the given region
+     *
+     * @param region the region to get the trace for
+     * @return the trace recorded in region or empty if no trace is recorded in region
+     */
+    public Optional<Trace> getActiveTraceForRegion(Region region) {
+        TraceRecordingWrapper traceWrapper = activeTraces.get(region);
+
+        if (traceWrapper == null) {
+            return Optional.empty();
+        } else {
+            return Optional.of(traceWrapper.getTrace());
+        }
+    }
+
     public long getStartTimeOfTraceInRegion(Region region) {
         TraceRecordingWrapper wrapper = activeTraces.get(region);
         if (wrapper == null) return 0;