We recently discovered that moving an item between vaults doesn't actually move it, it's a combination of 'copy' and 'move to trash'. I would classify this as an unexpected behaviour from a user standpoint.
This might pose a security issue if an item has been erroneously created in or moved to a vault, or if the item no longer fits within the scope of the vault and needs to be secured in a separate vault. The user "moves" the item, but it is still available in the trash of the originating vault. This is unexpected by the user who now thinks that the item is secured.
This problem is exacerbated by the inability to remove single items from the trash.
1Password Version: 7.3.2
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided