well i think its obvious from the topic but here's the case :  i feel like the game has a limit of loading things after a while even if the content  isn't that much , for example it has happened  many times : i had reached the nether a bunch of times in different worlds but whenever i came back to the over world my world wouldn't load anything and everything would be invisible and it couldn't do anything about it so i had to delete some worlds  . plz fix this.

thx