Watch the incident that cost the Sharks seven points at Newlands.
In the 66th minute, Cobus Reinach played the ball from an off-side position in the in-goal area, which prevented Dillyn Leyds from scoring a try after Odwa Ndungane had knocked the ball on.
According to Rule 11.1 (b) of World Rugby's regulations, the off-side rule does exist in the in-goal area.