When Vindicators open the door, theres a random chance that they suddenly make a door breaking sound, indicating that they're attempting to break the door for a split second for no reason.

To reproduce

Start a raid and put a Vindicator in an enclosed area with a door separating 2 sections, making the Vindicator use the door and walk between the 2 sections.
As the Vindicator keeps the opening the door there's a chance of them suddenly making a loud banging sound.

There's an example clip below with the banging sound at the end (it also displays MC-159297)