Summary:
If you press Ctrl and at the same time press (without holding down) the movement buttons (A, W, S, D) and the button to throw an item, the player will move endlessly in the direction in accordance with which you pressed the buttons.
It may take several tries to reproduce.

The player will stop if:

• open inventory
• open chat
• open any block interface
• open the menu
• hold down the button responsible for the opposite movement
• once again press the button towards which the player is moving

Steps to reproduce:

1. Place any item in the active slot.
2. Hold down the Ctrl button.
3. Press (without pinching) any movement buttons and the drop item button at the same time.
4. Repeat the steps if you cannot achieve the player's movement without your participation.

Observed results:
The player moves without your participation.

Expected results:
Pressing certain buttons at the same time should not create a continuous action.

Video:
Minecraft 2021-12-12 23-10-32.mp4