First of all, since this issue involves an add-on, I suppose we can assume that you are playing TESO with a PC or Mac. However, on which mega-server did you discover this issue? ZOS cannot investigate it without that information.*

Gandamir wrote: »

Hello,
Today I deposited some items into my bank (using the banker) when in my house. I then walked over to a storage chest, and my add-on BankManager (https://www.esoui.com/downloads/info753-BankManagerRevived.html) managed to withdraw items from my bank that were set to withdraw automatically.

I realize that addons are not necessarily supported, but it seems to be on your end and not the addons side.

You must re-load the add-ons -- with the banking management add-on excluded -- on the character, then repeat the actions exactly as you did before to see whether your character can access the bank while interacting with the homestead storage unit. If that does not occur, then the add-on has an issue, not the game software.

Of course, since your character cannot simultaneously interact with both (1) the homestead storage chest and (2) the Personal Banker, simultaneous access to the respective contents of both should never occur. However, while the Personal Banker is present, an add-on might have access to the bank account regardless of whether the character is interacting with the Personal Banker. That is not necessarily a flaw in the design of the game software.

Instead, whether an add-on does anything "automatically" in any context is an issue with that add-on.
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EDIT: typographic error

@Gandamir

.... But it is ALSO an API issue in that the bank is allowing LUA code to withdraw from it when the bank is not being accessed.

Yes, I see what you mean. While a Personal Banker is present, evidently there is nothing to stop any character's add-on(s) from accessing that character's bank account.

So the issue is that an add-on can access a character's bank account regardless of whether the character is currently interacting with the Personal Banker. Access to any bank account should be available only while a character is interacting with either a Banker NPC, or a Personal Banker.

It is worth recognizing that any other player's character can access their bank via the Personal Banker summoned by any player character, and any add-on in use by that player character will have access to that character's bank account. However, only one player's character can interact with the Personal Banker during any given period of time.

It does not seem likely that the same limitation currently applies to add-ons which access the Bank account of the character for which the add-on is loaded and running. I cannot recall whether I've ever read any reports about it happening, however.

As far as I know, that is not possible with a Banker NPC. Each player's character must interact with the Banker NPC independently for any add-on for which that character is in use to also interact with that player character's Bank account.