remove the animation from preview button on cleanup

abogen/gui.py

@@ -1545,6 +1545,10 @@ class abogen(QWidget):
 
     def _preview_cleanup(self):
         self.preview_playing = False
+        try:
+            self.loading_movie.frameChanged.disconnect()
+        except Exception:
+            pass  # Ignore error if not connected
         self.btn_preview.setIcon(self.play_icon) 
         self.btn_preview.setToolTip("Preview selected voice")
         self.btn_preview.setEnabled(True)