When you move and then press the pause button in the game, It'll make the player shaking

What i was expeting was:
1. Launch minecraft
2. Make a new word
3. Pause the game whilst moving (change some settings)
4. do some commands with the new feature for the command blocks
5.nothing bad happens

And what i didn't expect was:
1. Launch minecraft
2. Make a new word
3. Pause the game whilst moving (change some settings)
4. do some commands with the new feature for the command blocks
5. Pause my game again and realize my character's entity is shaking
6. Just stare at it like 3 hours and not making any progress and think about it