Opening one specific world will crash the entire game and get me thrown out of the app. When I try to use my other world, somehow it works. Why is that?

On one of my two worlds, I open it and it loads up until the second BEFORE the world actually opens. Once it hits that point the app brings me back into my phone's home screen where all of my other apps are. I tried opening the other world I had and did not encounter the same problem, though. Why would this happen and can you please fix it? I cannot attach an attachment because it is a long process to do and needs a video instead, not just a picture.