Invisible Walls and Glitching

Once I leave spawn and go a certain distance, there’s like an invisible wall and it glitches if I try to get through. It’s been bothering for a while and it happens if I’m in my own world or LAN worlds and even XboxLive worlds. I hope you can fix this soon, because it’s kind of making me not want to play if I can’t really go on a new adventure and only go about 200 blocks from spawn.