If a piston is pulsing very quickly then you can see the head retracted and out at the same time

What I expected to happen was see the pison head move very quickly out and in

What actually happened was during many frames the piston looked as if it had 2 heads

Steps to Reproduce:
1. Make a fast redstone clock running into a piston
2. In some frames the piston will have 2 heads
3. At some places if you pause the game the piston will be retracted and out at the same time

The video is of the glitch, f3 is so you can see the version the paused at the end is so you can see that the piston is both out and in at the same time also the slow motion part is to more easily see the glitch

*Note the video is in bad quality so the file did not exceed 10MB it is only in 15fps however when playing the game at 60fps it looked the same way.