Do you know why I always lose my watchlist in MT5

 
Do you know why I always lose my watchlist in MT5 every time I go to browse another app and comes back to MT5 app; when you lose your saved watchlist I have re-enter all the instruments again and again; this happens three to four times a day; is there a way to have it saved permanently 
 
which terminal does this happened on?  windows or anroid?