Sometimes when you're walking forward, the action sticks and even though you have already stopped pressing the key, the avatar continues walking. This mainly occurs when you're standing in the nether portal (whether you enter or exit). In the case of boats, the change to the left or right isn't made. And in horses, it happens that even if you stop pressing, it keeps running.

And this happened with the update, since before updating I was playing and everything was fine. It was after entering 1.16 that these errors occurred.