When using a flying machine, (2 honey 2 slime 2 piston 2 observer) and let it run wild, if you follow it around for a bit, it creates weird shapes in the sky.

Seed: 1590444764897283409

If you get rid of the flying machine, the glitch vanishes and the triangles no longer appear. 
Video: https://drive.google.com/file/d/12sgkSjoGBrqaInRuHpxvvdVTGLKSXxrd/view?usp=sharing

Another Video: https://drive.google.com/file/d/1RrscFgDEQICLWlsrlrXNTN3sMmveig5Z/view?usp=sharing

What I expected to happen: 

The game would continue normally, not displaying any weird things in the sky

What Actually happened:

The game decided that it has had enough of flying machines and created weird things in the sky

Steps to reproduce:

1: Create a flying machine high enough that it wont crash into any hills and such (use image below for reference)

2: Start the flying machine by placing a block in front of the observer (either one)

3: Fly around and experience the triangles and weird things that happen.