Crashes and extreme lag in 1.14.1.

Not sure if the lag is from the game or my tablet.

 

I have a 7th generation iPad mini and I am witnessing extreme lag and sometimes crashes when I play Minecraft. As shown in the video, game loading takes upward of a minute. It may be because I have 850+ worlds, and my game is nearly 10 GB in size. However, I have over 60 GB left.

 

Expected result: Regular FPS and no crashing.

 

How to reproduce: Not sure, like I said it may be something with my tablet as my iPhone 7 is currently not receiving lag.