A door hard against a corner is common in closets and bathrooms, and wall-framing-takeoff used to refuse it: the engine wanted a king stud on each side of every opening, and there was no room between the jack and the end stud.
Framers let the end stud be the king. The engine now does the same: kings that do not fit are dropped, down to none, on either end of the wall, and a note in the layout says the end stud is doing that job. The jack studs still have to clear the end stud, so an opening closer than 3 in (with one jack) is still refused, with that number in the message.
Checked with unit tests and the per-wall self-check on hand-built walls, not against a framer's real corner detail. Estimates only, not engineering or building-code advice.