diff --git a/js/BatchPreviewManager.js b/js/BatchPreviewManager.js
index 7bd79c7..8989fef 100644
--- a/js/BatchPreviewManager.js
+++ b/js/BatchPreviewManager.js
@@ -134,6 +134,22 @@ export class BatchPreviewManager {
         this.canvas.render();
     }
 
+    addLayers(newLayers) {
+        if (!newLayers || newLayers.length === 0) {
+            return;
+        }
+
+        if (this.active) {
+            // UI is already open, just add the new layers
+            log.info(`Adding ${newLayers.length} new layers to active batch preview.`);
+            this.layers.push(...newLayers);
+            this._update();
+        } else {
+            // UI is not open, show it with the new layers
+            this.show(newLayers);
+        }
+    }
+
     navigate(direction) {
         this.currentIndex += direction;
         if (this.currentIndex < 0) {
diff --git a/js/Canvas.js b/js/Canvas.js
index 20bd719..d95e6b9 100644
--- a/js/Canvas.js
+++ b/js/Canvas.js
@@ -493,8 +493,8 @@ export class Canvas {
                 log.info('Auto-refresh triggered, importing latest images.');
                 const newLayers = await this.canvasIO.importLatestImages(lastExecutionStartTime);
 
-                if (newLayers && newLayers.length > 1) {
-                    this.batchPreviewManager.show(newLayers);
+                if (newLayers && newLayers.length > 0) {
+                    this.batchPreviewManager.addLayers(newLayers);
                 }
             }
         };