Switching gamemode in game doesn't switch completely

I loaded a world I created in TU14 (I think) in Creative Mode. I'm playing with another player on splitscreen. I have Host Privileges enabled, so I try to switch my gamemode from Creative to Survival. I back out of the menu and I'm still in Creative Mode. I can't access the crafting space or survival inventory, pressing X/Y for some reason brings up the Creative interfaces. The HUD also shows like I'm in Creative Mode. However, I can still die. Once I've died, the game realizes I'm in Survival Mode and all is well, until I switch back into Creative Mode. The same problem happens, the Survival Mode interfaces still show up but I cannot die. I have to reload the world in order to get back into Creative Mode. If I reload and try to switch my gamemode again the problem still persists.