spacehimbo

My Engineer character has Wakeful, Fit, Thin Skinned, Gymnast, Hunter, Iron Gut, Hearty Appetite, Short Sighted, Cat Eyes, Amateur Mechanic, Keen Hearing. started off Underweight but is a stable weight and has gained the Stout trait. Partner's Fry Cook character has Thick Skinned, Strong, Baseball Player, and Gardener - no sleeping related traits. I notice my character has gotten sick more often than him.

Indoors, temperature is alright thanks to an antique oven (not perfectly ideal but not able to get you hypothermic even when naked). While me and my partner are playing with mods, this has happened to us in a vanilla server. We can try testing on a new server if needed.

is your car towing anything? I know if you tow the 'wrong' way (attaching the car being towed to the towing car vs. going to the back of the towing car and attaching to the front of the towed var) it locks the car from being used even with the engine on etc

Same thing happens here. Colds come with it, sleep is interrupted three times a night at most. Hyperthermia happens as well, in the middle of winter.