Update app.py

app.py

@@ -315,11 +315,11 @@ def loadurl(url):
 def select_frame(v, evt: gr.SelectData):
     global frame_selected
     global masks
-    masks[frame_selected] = v
     
     if evt.index != frame_selected:
+        masks[frame_selected] = v
         frame_selected = evt.index
-    v = masks[frame_selected]
+        v = masks[frame_selected]
     #print(v)
     return v, frame_selected