The bug
When a vault deactivates due to losing player proximity, a deactivation sound event is triggered. However, such an event is not triggered if the block is destroyed while active.
This is in contrast to beacons, which do play their deactivation sound event when broken in an active state (MC-154019).
How to reproduce
Break a vault while it is active
Observe
Expected results
The "Vault extinguishes" sound event would play as the block is broken.
Actual results
It is not.
Further notes
The deactivation sound should NOT be played if vaults are broken in an inactive state. See also MC-153086
Can confirm