diff --git a/.eslintrc.js b/.eslintrc.js
index 2e7258f6b..aa8039f61 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -88,6 +88,7 @@ module.exports = {
         // imageviewer.js
         modalPrevImage: "readonly",
         modalNextImage: "readonly",
+        updateModalImageIfVisible: "readonly",
         // localStorage.js
         localSet: "readonly",
         localGet: "readonly",
diff --git a/javascript/imageviewer.js b/javascript/imageviewer.js
index 979d05de5..69159be98 100644
--- a/javascript/imageviewer.js
+++ b/javascript/imageviewer.js
@@ -54,6 +54,7 @@ function updateOnBackgroundChange() {
         updateModalImage();
     }
 }
+const updateModalImageIfVisible = updateOnBackgroundChange;
 
 function modalImageSwitch(offset) {
     var galleryButtons = all_gallery_buttons();
diff --git a/javascript/progressbar.js b/javascript/progressbar.js
index c81a41e9a..e7864bba9 100644
--- a/javascript/progressbar.js
+++ b/javascript/progressbar.js
@@ -190,7 +190,7 @@ function requestProgress(id_task, progressbarContainer, gallery, atEnd, onProgre
                         livePreview.className = 'livePreview';
                         gallery.insertBefore(livePreview, gallery.firstElementChild);
                     }
-
+                    updateModalImageIfVisible();
                     livePreview.appendChild(img);
                     if (livePreview.childElementCount > 2) {
                         livePreview.removeChild(livePreview.firstElementChild);