When flying across ice at least approx. 10 blocks above it, dark blue squares appear on it near the edge of the screen.

Steps to Reproduce:

1. Create a new world with seed: 6895947282196191249
2. Fly at least 10 blocks above the Ice sheet in this world.
3. Observe that the Ice has dark blue squares/rectangles across it.

Expected Result:

The ice just looks like, a sheet of ice without any holes.