At 0:27 of overtime in the Flyers/Red Wings game, the Situation Room initiated a review under the terms of a Coach's Challenge to review whether Philadelphia was off-side prior to Travis Konecny's goal.

After reviewing all available replays and consulting with the Linesman, NHL Hockey Operations staff determined that Konecny tagged up and entered the attacking zone legally prior to the goal.
Therefore the call on the ice is upheld - good goal Philadelphia Flyers.