Auto Responder API Issues

I don't know if this is something introduced in a recent version or not because I only just received a support request about a vacation responder plugin I wrote for roundcube, but I have confirmed the issue. What's happening is when I add an autoresponder through the api it automagically turns off local delivery. This doesn't seem to be a desired effect in most instances. I think if that is done at all it should be due to an explicit option. Let me know what we can do here as my customers use the auto responder plugin a lot so I need to get this fixed asap.