CeeDee Lamb was unhappy about losing a ball in the sun on an incompletion that helped keep Dallas from scoring a go-ahead touchdown in the first half of a 34-6 loss to Philadelphia on Sunday.

Cowboys owner and general manager Jerry Jones was perturbed that the sun was brought up again as an issue in his $1.2 billion retractable roof stadium, which has glass doors on either end.

AT&T Stadium has an unusual east-west alignment from end zone to end zone, as opposed to most venues being north-south. On clear days, the sun shines in the windows on the west side during the first half of games that kick off in the afternoon.

Lamb, Dallas’ All-Pro receiver, was looking into the sun in the second quarter while open on a crossing route in the end zone when a throw from Cooper Rush went behind him and he never adjusted to the ball.

Lamb then pointed to his eyes and was making similar gestures on the sideline during another frustrating home loss for the Cowboys (3-6), who are on a four-game losing streak overall and 0-4 at AT&T Stadium.

“I couldn’t see the ball. Couldn’t see the ball, at all. The sun,” said Lamb, who ended a preseason-long holdout by signing a $136 million, four-year contract extension in late August.

Asked whether the Cowboys should put up curtains, Lamb said: “Yes. One thousand percent.”

And on the question of making the suggestion to Jones, Lamb said, “I mean, y’all are doing my job for me right now.”

It has been suggested plenty of times, and Jones always has flatly rejected it. The 82-year-old billionaire angrily rebuffed it after bringing up the issue unprompted after the game.

“By the way, we know where the sun is going to be when we flip the coin, so we do know where the damn sun is going to be in our own stadium,” Jones said.