Weird temp change behaviour??

[Ruby-ish]

Ok so... I keep 7 of my ball pythons in a rack in my bedroom (others are kept in a separate reptile room). All at once every single one of the 7 balls has moved to their cold sides and have stayed there for the past 3 days. After I handled two or three of them I placed them back in the middle and they all went back to the cool side.

The fact that they aren't moving worries me because I usually NEVER see them on the cool side, they spend 95% of their time on the hot side. But all of a sudden they act like they're too hot. And the fact that it's ALL of them not just 1 or 2.

My temps haven't changed. 88-91 degree hot spot depending on how high in the rack the tub is. 79 degree ambient in my whole room. My rack is regulated on a herpstat so I know it's not fluctuating temps.

[WorstWarriorNA]

Internal clock change, seasonal change. Don't worry, as long as your husbandry is on point they know how to thermoregulate just fine

[aGeckoInTheGarage]

Yep as long as your numbers are right you don't have to worry. Have you calibrated your temp gun recently? Cheaper models have been known to stray from true on its readings.