Regarding events reappearing

Hi, in this event I'm creating, animals such as birds and butterflies will fly out of the grass when you step on a certain tile and you will be able to catch them. It works fine, the only problem is that when I exit and reenter the map, the butterfly is already uncovered as if the tile had already been stepped on. I want him to go back into hiding in the grass. How can I make it so that he appears every time you reenter the map and step on the tile, instead of just the first time?


Screenshots of event:

you need to switch off the self-switch before erasing the event - switches will be remembered independently through the game

Thank you, it worked!