The Dutch midfielder struck the ball into the back of an empty net rather than return it to Bluebirds goalkeeper David Marshall who had assisted the Canaries by putting the ball out of play when Alexander Tettey was down injured.
Fer's action attracted a lot of criticism from all around but Hughton was quick to defend the player, saying he is not a dishonest person.
"He's been made aware," the Canaries boss told reporters.
"It has been spoken about, and for us it's something we left as soon as we left the changing room. It's been dealt with.
"Leroy spoke very honestly after the game. He's an honest lad. I think he just got caught up in the moment.
"It was a fairly frustrating day for us. It was a game we should've won and could've won reasonably comfortably.
"He's a very honest individual, but I think he just got caught up in the moment."
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