The UFC on ESPN 40 opener ended in bizarre fashion Saturday after referee Chris Tognoni polled the three judges cage-side whether one fighter tapped. Mayra Bueno Silva and Stephanie Egger kicked off the prelims in a flyweight bout. The fight quickly hit the canvas with Egger on top. Bueno Silva shot up for an armbar and released, a signal Egger tapped perhaps out of view of the camera and referee Chris Tognoni. There was some confusion as Tognoni called off the bout and immediately signaled for a replay, as he circled his fingers in the air. After a brief conference…