World Not Loading

I can view every part of my world, but when I play on xbox live with my friends they can not view some biomes. I was exploring and I could clearly see this forest biome and the water surrounding it, but my friends could not. I find this to be quite unusual. When i go into multiplayer from my screen with more than one player on my xbox everyone on my side can see it, but none of the players connected through live can see the biome. This becomes an issue, i have had many friends fall through the biome trying to load it, and they either fall into lava or they drown to death. This has become very annoying