Buckingham had to leave the Kassam early in midweek after feeling unwell during Oxford’s 1-1 draw with Derby County.
United assistant manager Craig Short told the media post-match that Buckingham had been checked over by the club doctor and recommended to head home after feeling ill with half an hour to go in the game.
“I went a little bit light-headed on Tuesday,” Buckingham said.
Crystal Palace striker Eberechi Eze said the referee told him he made an error as the official’s “monumental mistake” denied the forward a brilliant goal in his side’s loss to Brentford.
Eze found the net directly from a wide free-kick with the match goalless, but referee Sam Barrott had already given a foul after Will Hughes clashed with Nathan Collins.
With the whistle blown before the ball entered the goal,
