With weapon collision added in, when near physical structures.
If you're in ADS (Aim Down Sights), and go too close to a physical structure/object (buildings, trees, etc.),
the weapon collision activates, and once the weapon collision deactivates, your gun is left in this weird half ADS, half Point aiming state.

If you look in third person, it looks like you're ADS (but you're still in point-aim mode), but 1PP it looks half point-aim, half ADS