The Nigeria international failed to convert his kick as the Foxes ended up sharing points with the Eagles
The King Power Stadium outfit received a penalty after James Tomkins knocked Luke Thomas into the box in their 1-1 draw against the Eagles in Monday’s Premier League game.
Iheanacho had the chance to take the kick, but his effort was saved by goalkeeper Vicente Guaita.
Wilfried Zaha then opened the scoring in the meeting for Crystal Palace before Harvey Barnes scored an important equalizer to help the Foxes avoid defeat.
Rodgers confirmed that the Super Eagles forward has proven his ability to take the Fox penalty in practice and encouraged the forward to put the disappointment behind him.
“I said at halftime you have to let go. He trained yesterday and hit five of five so he was confident but that’s just one of those things,” Rodgers said at Amazon Prime.
Despite the draw, Leicester retain second place in the Premier League table after collecting 29 points in 16 games.
Iheanacho is gradually moving to King Power Stadium, having struggled for consistency since joining the club.
The center forward teamed up with the Foxes in the summer of 2017 to Manchester city and has now made 78 Premier League appearances, scoring 28 goals.
In the current campaign, the 24-year-old has scored three goals and provided four assists in 15 appearances across all competitions.
Forward hopes to deliver a better performance when Leicester take on Newcastle United in the next Premier League game on January 3.
The striker has featured prominently for the three-time African champions in their recent friendlies and Afcon qualifiers.