This has happened to the Mass Effect World/Texture Pack and the Skyrim World/Texture pack. I had the Mass Effect and Skyrim world save on my world menu and was able to hide those maps but when I want to see it again I cannot unhide them, how am I able to go and see those maps again, I have looked for answers and cannot find one
This site is for bug reports for the PC version of Minecraft, for the Xbox 360 version please go here.
Please stop posting XBOX bugs!