Thumbnail's Skybox Incorrect

Minor issue, but recently, I noticed that the skybox in my game’s thumbnail has been rendering incorrectly. It’s been displaying skyboxes I never put inside the game. I don’t have a repro for it, as I don’t know what causes it.

The game DOES have a skybox. I don’t have the link to the model, but I’m sure you would recognize it in the in-game picture.

All of these pictures were taken at the same time, no updating inbetween.

Game’s Page

Recently Played

Developer Page

In Game (actual skybox)

Link to place: