The File Size (MB, KB, etc.) of My Worlds Are Going Crazy!

I have the latest version of Minecraft Pocket Edition: iOS, using an iPad Mini 4 with the latest iOS version. The file size is going crazy. I could open the app and go into a world that says it is 43.2MB, chop down a tree or something, save/exit, and then it's claiming to be 250.3MB! I go back into the world, which is now taking a lot longer than usual to load, do something else, log out, and then it's saying it's 41.0MB! I exit the app and restart it, it's back to normal, and then the whole cycle repeats itself! This is happening on all of my worlds, with it being a whole lot worse on the worlds I've explored more of and have been using more often. Also, I could go onto one world, and then when I exit, sometimes other worlds get affected by that bug! I have roughly about 2GB of storage space available on my iPad, and when I exit a world and see that multiple worlds claim to be 200+MB, I don't get the notification telling me that I should be careful because the storage is beginning to get a bit low, and that's what's most bizarre about it. I check the storage by going into Settings, and I still have over 2GB available. It's irritating the crap out of me, so can you please hurry up and fix it? FYI it's happening on worlds I haven't even filled a Level 2 Map up on as well. Please fix it soon, I don't want other people encountering this glitch and panicking because they think their phone with 30MB available storage is having all it's info crammed to make room for 200+MB of a level in a high-resource 3D Game and then take it to the Apple/Android Store to have their phone potentially wiped. Please fix it.

EDIT: The first image is after I have exited my world after a while. The second image is when I went to the settings for that world right afterwords, and the third image is of me exiting the world settings and the file size is back to normal!

UPDATE: Here are some more screenshots of this glitch happening. I will post them in the order they actually happened so you can see how crazy this glitch really is. Remember, they are IN THE ORDER THEY HAPPENED. They are in the Attachments section, in the order of occurrence with the top image being the oldest and the bottom image being the most recent.

Also, even though it says it on the world selection screen, it does not affect the actual storage of my iPad in the slightest. It occurs, I check the iPad storage to find that it has not even dropped down 1/100 of a GB!