PHILADELPHIA — This keeps getting more alarming.

Kevin Knox, the Knicks’ 2018 lottery pick, was benched for the entire second half of Thursday’s 115-106 loss to the 76ers. He played 7:50, scoring one point. He missed all three of his shots and was 1-for-4 from the free-throw line.

Knox’s stunning sophomore season has his scoring average dipping to a paltry 6.3 points. He has averaged 10 minutes fewer a game than during his occasionally solid rookie season.

Still, before the contest, Knox sat at his locker at Wells Fargo Arena and sounded unconcerned. He said he believes this isn’t a season of regression because of improvement on the defensive end.

“Last season was a little different with my [playing] time,’’ Knox said. “But my confidence is the same and my body’s good. I think I’ve definitely gotten a lot better. I really am trying to get better on defense. That’s been my mindset the whole season. I’m not really worried about the offense. That’s going to come, shots are going to fall. I really want to lock in defensively and making those extra plays.’’

Wednesday at Charlotte was not a good scene either, as Knox showed his frustration.

Shoulders slumped, head down, Knox looked upset as he trotted off the court after interim coach Mike Miller yanked him 2:52 into the fourth quarter of the loss to the Hornets.

Knox had just committed two straight miscues on drives to the basket. He lost the ball once for a turnover as he tried to shovel a pass to Mitchell Robinson. He also forced up a contested runner that missed everything.

If this were last season, former coach David Fizdale would have let Knox stay in and live through the mistakes. Knox claimed he wasn’t upset at Miller — just himself.

“I made some mistakes,’’ Knox said before Thursday’s game. “I always look back on some plays I could’ve done better. That’s what I was frustrated about. I made some wrong reads. I was trying to throw it to Mitchell. They were staying with Mitch. I made the wrong read. That’s what I was frustrated about.”

The shots have not fallen enough (36.5 percent from the field) and he has not been involved enough. In 23 minutes Wednesday, he scored just four points on 2-for-5 shooting.

In the past three games, Knox had tinkered with his jump shot. He’s putting on a lot more arc, to the point at which his launches resemble moonballs.

“Something I looked at, something I’m working to keep arcing the shot at all times,’’ Knox said. “It’s come naturally, getting shots up, getting more arc on the ball and have more chance of going in. It feels good. They’re not going to fall every night. I just got to keep shooting with the right mechanics and stay consistent.’’

A pregame staple is Knox sitting courtside with assistant coach Jud Buechler as the two look over plays on an iPad. Buechler is a former teammate of Michael Jordan and Scottie Pippen. Miller said they go over offense and defense.

“He’s always talking to me about things I can do better and where I can excel at,’’ Knox said. “He’s been around some of the greatest players in the game. So I’m trying to pick his brain.’’