it not saving problem but i don't how to said it so i will describe it to be specifique every time i edit node or executed code it don't save it return like i have never edit it and some times i build code for hour when i finish it and close the executed code it returns empty and this apply with all type of card and there is lot of laggs when i move a cards.

can you try clearing your cache/cookies/local storage?

Thanks for replay but still the same problem