Creating/Entering A World Needs To Be Signed In Xbox Live and 6+ Render Distance

I was entering a world offline and in 4 render distance because I was going to record the brand new update. My phone is very slow when I record that's why I turned WiFi off and reduced my render distance to the lowest chunk generation. I was waiting for about 15 seconds then the loading bar was all filled, but it only stayed on "Building Terrain". I waited for 5 minutes and it is still the same. I tried to create a new world again and the situation was still the same; loading bar is full and only stayed at Building Terrain. When you actually enter a world with no WiFi and your not signed in with Xbox Live with a render distance of 4, all of your worlds or when you create worlds will be stuck at the "Building Terrain" while your loading bar is full. Even if you signed in to Xbox Live with WiFi turned on and with render distance of 6+, the problem is still there. The only thing that can fix this is backing up your worlds then uninstalling Minecraft PE and deleting the games folder. I reinstalled Minecraft PE again and that fixed the problem. You will need to be signed in to Xbox Live, turn your WiFi on, and set your render distance up to 6+. If you do not follow this, the problem will be there. Please fix this bug and I will appreciate your response.
Device: Sony Xperia E4g Dual