Ten Hag claimed Rashford was absent from the fourth spherical conflict in south Wales after saying he was in poor health on Friday.
However reviews over the weekend urged the England ahead had spent Thursday night at a Belfast nightclub earlier than lacking coaching with United the following day.
“He reported in poor health,” United boss Ten Hag stated after United blew a two-goal lead earlier than surviving their journey to fourth tier Newport.
“The remainder is an inside matter. I cope with it, we’ll cope with it.”
Ten Hag stated there was a “no good tradition” when he arrived at United and he has encountered disciplinary points throughout his Outdated Trafford tenure.
United winger Jadon Sancho returned to Borussia Dortmund on mortgage earlier this month after falling out with the Dutchman.
Rashford was additionally dropped for a Premier League match in opposition to Wolves final season after turning up late to a crew assembly when he overslept.
Pressed on his newest problem with Rashford, Ten Hag stated: “I do not go on this case. We talked earlier than about it, we performed a great recreation, and now we transfer on.”
United struck twice within the first half in opposition to opponents 76 locations beneath them within the pyramid due to targets from Bruno Fernandes and Kobbie Mainoo.
However Bryn Morris and Will Evans scored both aspect of half-time to depart United at risk of a humiliating defeat.
Antony and Rasmus Hojlund struck within the last levels to spare United’s blushes, but it surely was one other disjointed show in a troublesome season for Ten Hag.
“The primary 35 minutes it was very dominant. We didn’t give the opponent any likelihood and may have been three, 4, five-nil up,” Ten Hag stated.
“Out of nothing they rating a objective and straight after half-time once more.
“We’ve got to be important of dangerous defending in transition. Poor defending from the cross, it is 2-2, and so they turned it round.
“However you see how resilient we’re. We stayed calm, went again in our recreation, bought the third and fourth objective, so job accomplished.”
Casemiro, Lisandro Martinez and Luke Shaw had been all again within the United beginning line-up after damage, whereas Harry Maguire made a late cameo for his first look since December 12.
Ten Hag hopes the return of these skilled stars may also help a crew who’re eighth within the Premier League and have been eradicated from the Champions League.
“I do know the character from Licha (Martinez), Casemiro, Luke Shaw, (Raphael) Varane, Bruno, Antony, (Alejandro) Garnacho, Hojlund. All fighters,” Ten Hag stated.