snake constantly stays on the cold side of the tank?

[B.P.'s 4me]

Anyone ever see this. My snake stays in the hide on the cold side of the tank constantly. I even moved the under tank heater to the other side and he moved to the cold side within an hour. I measured the temp using an infrared thermometer and the warm side is sitting around 90. Why would my snake prefer the cold side so much?

I have a young female like that. Ever since I brought her home as a hatchling, she prefers the cold side of her bin and often wraps around the water bowl. My hot side is about 88 F., cold side is about 78 F. I used to worry about it and move her back to the warm side, but she'd return to the cold side next time I checked. Occasionally, she'll compromise and park her butt in the hot hide but the rest of her body is stretched out toward the cooler end.
Apparently she never read the book on preferred temperatures for ball pythons.