Chiefs coach Warren Gatland says the disputed lineout call from referee James Doleman was the "difference" as his side went down to the Crusaders in Christchurch.
Gatland said the Chiefs camp was "furious" at the time of the Crusaders second try, feeling they had been denied a penalty.
That so-called fury was significant, as it distracted the Chiefs from defending a quick lineout after the Crusaders' All Black wing Sevu Reece jogged some distance to retrieve the ball.
The quick throw from Reece created a Will Jordan try to put the home side in a winning position they were able to protect in the tough conditions.
The Chiefs had been caught short, with players apparently trying to cajole a penalty out of Doleman for a Jack Goodhue ruck infringement.