Can't Open Previously Created Worlds After Aquatic Update

Since the aquatic update, previously created worlds won't open.

Steps to repoduce:

1. Launch Minecraft
2. Tap Play
3. Tap on a previously created world with the following settings
   1. Creative
   2. Peaceful
   3. Old World
   4. Pick a Seed (Sunflower Field or Taiga Bay or Winding River)
4. On the next screen, the loading screen, Progress bar fills up until full. Text continues to cycle, showing different messages, but world never loads. Tried letting it sit for about 5 minutes. It usually takes about 5 seconds after the progress bar loads.

Another note: The aquatic update notification message appears EVERY time the app is launched. Each time the Continue button is tapped, but the message still displays every time.