If an add-on sets event.cancel to true of a playerInteractWithBlock event, and the block interacted with is a door, the door will still open for a split second on the client, allowing them to glitch through to the other side. Other players still see a closed door.

EDIT: I have renamed the bug because I suspect that this is related due to the animation controllers still being triggered, and some other blocks still play their animations. I have attached a video of my character interacting with a bunch of blocks with the example add-on enabled, and while nothing else happens, they still have their animations triggered. Since the door's animation includes a change in the hitbox, the door's animation also causes you to be able to glitch through.

Expected Result:

No animation plays on the block.

Doors stay closed for both client and server and player cant pass through if the playerIneractWithBlock event is canceled.

Observed Result:

Some blocks have their animations played.

Doors stay closed on server but open momentarily on client, allowing client to pass through.

Steps to Reproduce:

1. Open a new world.
2. Place blocks.
3. Add to that world an add-on that cancels playerInteractWithBlock Before Event signals, like this (attached is an add-on that does this):
main.js:

import * as server from '@minecraft/server'
server.world.beforeEvents.playerInteractWithBlock.subscribe((event) => {
    event.cancel = true;
});

4. Interact with the blocks you placed down.