Running or Sprinting off an elevated area (Docks/Harbours/etc.) into the ocean leaves the camera misaligned downwards while underwater and subsequently returning to land/shore. If you then aim down sights on the shore it will appear to of repaired the issue, However, if there is a slope on the shore and you aim down sights and you then begin to walk up said slope back inland, the camera will elevate far above the players head in the opposite direction to the original and alignment.