Gary O'Neil claimed he had received an apology from referees' boss Jon Moss after Wolves were somehow denied a late penalty that would have given them a point against Manchester United.
Deep into stoppage time, United goalkeeper Andre Onana tried to claim Pedro Neto's cross but instead clattered Wolves substitute Sasa Kalajdzic, knocking him to the ground.
Referee Simon Hooper did not give a spot-kick and even though the decision was checked, VAR Michael Salisbury upheld it, with Hooper's original call bizarrely not deemed a clear and obvious error. A furious O'Neil was booked for his reaction and then detailed his conversation with Moss, who manages the Premier League referees.