Saving and exit option Will keep players out of worlds when used in the Nether

When I was in the Nether I had to do something, so because if the player pauses everything else won't, I saved and exit the world. After I was done I tried to go back Into the world the generating world screen was the only thing I could see in the game...and villager's... And pointless text that no one reads... And the Minecraft title scree- ok you get the idea! I tried to see if the glitch would happen in creative mode, and sure enough, it dose! I'm an Xbox player(bedrock edition) and I don't know if this works on any other platform. I hope you guys can fix it so I can go back and kill the wither.

                                                                                                                               - the ender ender enforcer