Update refApp.py

refApp.py

@@ -154,6 +154,16 @@ st.markdown("""
             font-size: 0.85em !important; 
             margin: 0 !important; 
         }
+        div[data-testid="stExpander"][aria-expanded="true"] {
+            transition: none !important;
+        }
+        div[data-testid="stExpander"] div[data-testid="stExpanderDetails"] {
+            transition: none !important;
+        }
+        div[data-testid="stExpander"] .streamlit-expanderContent {
+            will-change: auto !important;
+            contain: layout !important;
+        }
     </style>
 """, unsafe_allow_html=True)