diff --git a/src/main/java/ai/nets/samj/ij/ui/Consumer.java b/src/main/java/ai/nets/samj/ij/ui/Consumer.java
index 3f9ffd8..ed0bd5f 100644
--- a/src/main/java/ai/nets/samj/ij/ui/Consumer.java
+++ b/src/main/java/ai/nets/samj/ij/ui/Consumer.java
@@ -205,6 +205,9 @@ public void windowClosed(WindowEvent e) {
 		roiManager.close();
 		this.selectedModel.closeProcess();
 		this.selectedModel = null;
+		this.activeImage = null;
+		this.activeCanvas = null;
+		this.activeWindow = null;
 		this.deactivateListeners();
 	}