The Nigeria international scored the Foxes' goal, though also blundered for Chelsea's opener.
"I'm not trying to think about it (his mistake in the first half). It keeps popping up in my head, but that's how football is, so I have to move on," Ndidi told Sky Sports after the match.
"I think we got over it after the first half and pushed the game up well. We had to respond.
"It's a mixed feeling. We've tried this combination a couple of times for training and James Maddison said I could score this way.
"We take the positive with us from the game, where we did particularly well in the second half."