User blog:Gjmalian/WORLD IS NOT WORKING

While playing on one of my minecraft pe servers it suddenly shut down when I closed the tab and tried to go back on the server it was fine for 5 seconds then the whole world suddenly paused and didn't allow me to do anything I again closed the tab and reloaded the world but it did the same thing. I tried playing on a different world and there was no problem but this specific world keeps shutting down this is the largest of my worlds and has 17.4 MB any ideas as to why this keeps on happening ?