Whilst on a flying machine in the sky on seed 1590444764897283409, blocks (mostly pistons for all I can see) seem to appear randomly in the sky for around 1-2 frames. (I was running at 90fps, then 30 to see what was going on). These blocks, however, are very unusual in the fact that they did not align themselves to the grid. These were pointing in whatever way they wanted to. I was not using any mods, just vanilla Minecraft. I was at coords 352 96 91, Facing: north (Towards negative Z) (143.0 / 9.0)

Video (that was too large to upload apparently): https://drive.google.com/file/d/1W5NBknLxdKQcch1XVLAnhUiw6WaniZw4/view?usp=sharing

What I expected to happen:

The game would handle the flying machine like a champ and not display weird pistons of any kind facing any direction.

What actually happened:

The game suffered a blow and decided to throw pistons into the sky at all different kinds of angles.

Steps to reproduce: 

1: Use the flying machine in MC-252919 and start it up.

2: stand on it and experience the weird pistons that show up everywhere. (Sometimes it isn't pistons, it's something else)