At 12:55 of the second period in the Canadiens/Oilers game, Edmonton requested a Coach's Challenge to review whether Andrew Shaw interfered with Edmonton goaltender Cam Talbot prior to his goal

After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee confirmed that Shaw's position in the crease did not impact Talbot's ability to play his position in the crease and therefore no goaltender interference infractions occurred.
Therefore the original call stands - good goal Montreal Canadiens.
Since the Coach's Challenge did not result in the original call being overturned, the Edmonton Oilers forfeit their time-out.