Fixed the session clean-up by work-around for Gradio bug #12159 (https://github.com/gradio-app/gradio/issues/12159).

app.py

@@ -385,8 +385,6 @@ with gradio.Blocks(css               = css,
    # ====== Session handling ================================================
    # Session initialization, to be called when page is loaded
    gui.load(initializeSession)
-   # Session clean-up, to be called when page is closed/refreshed
-   gui.unload(cleanUpSession)
 
    # ====== Header ==========================================================
    with gradio.Row(height = '10vh', min_height = '10vh', max_height = '10vh'):
@@ -479,6 +477,13 @@ with gradio.Blocks(css               = css,
             outputs = [ outputGallery, analysisOutput ]
            )
 
+   # ====== Session handling ================================================
+   # Session clean-up, to be called when page is closed/refreshed.
+   # This must be the last statement of gr.Blocks(), due to bug #12159!
+   # -> https://github.com/gradio-app/gradio/issues/12159
+   gui.unload(cleanUpSession)
+
+
 # ====== Run the GUI ========================================================
 if __name__ == "__main__":