The controversy began when Sweden’s Oskar Eriksson accused Canada’s Marc Kennedy of double‑touching the rock past the hog line during a match. Officials saw no violation, but the dispute escalated into a heated exchange at the ninth‑end break. In response, World Curling announced that two umpires would rotate across all four sheets to watch hog‑line releases for the rest of the Games.
The new rule enforcement led to the removal of a stone from play for Canada’s Rachel Homan in the first end against Switzerland and for Great Britain’s Bobby Lammie in the ninth end versus Germany. Homan, who delivered a fourth‑stone, expressed greater frustration than Lammie, who was a second‑stone.