Yes this still happens with 0.15.9. I have some updates for my report now, I am now using an iPhone SE (iPhone 8,1) running iOS 10.0.2. Same world, same problem. I think it is called NBT data, and it seems that it is always loaded, using resources even with multi-player off. I think it keeps the NBT in RAM but the problem is it doesn't need to use it. It loads data of all players inventories, coordinates, direction, skin, etc when they aren't even on the world at the time. This results in massive lag or freezes for a few seconds when crossing chunks.
Yes this still happens with 0.15.9. I have some updates for my report now, I am now using an iPhone SE (iPhone 8,1) running iOS 10.0.2. Same world, same problem. I think it is called NBT data, and it seems that it is always loaded, using resources even with multi-player off. I think it keeps the NBT in RAM but the problem is it doesn't need to use it. It loads data of all players inventories, coordinates, direction, skin, etc when they aren't even on the world at the time. This results in massive lag or freezes for a few seconds when crossing chunks.