You've just picked the front door lock ... you sneak into the house still hidden ... the residents go absolutely nuts and threaten to call the guards!
It's a reaction and dialogue bug that has always been there, that even while hidden and able to steal at your leisure without incurring a trespass bounty or a violent reaction the residents still chat away to you as if they can see you. With the latest additions to the game I'm back to stealing for various reasons (furniture/plans/tome points) and this is as much an annoyance as it ever was.
That you can interact with the door outside without breaking stealth, but interacting with the same door from the other side pulls you out of stealth is also another major annoyance. If you can do one without breaking stealth why can't you do the other?
These are old annoyances and old bugs, but they still need fixing.