Frostbite while in snow shelter

[hozz1235]

Didn't think it was possible, but I got it for the first time in my 1400 hours of playing TLD.  Was in AC and used a normal sleeping bag.  Woke up with it.

[Booch]

What mode?

[peteloud]

I think that all the occasions I have had frostbite have been due to my forgetting to replace an item of clothing, usually gloves.

[hozz1235]

Voy.  I had clothing on all body parts.

[wilsonaka]

The only thing I can think of is you might have had on a piece of frozen clothing. Other than that, I think it's got to be a bug.

[panda_gamer87]

While snow shelters do provide a small warm bonus, they are still quite exposed to wind and such. The best way to not wake up with frostbite would be to wear super thick wool clothing or sleep in a bear skin bed roll which provide like 12 degree warm bonus.

[Schrodingers Box]

Pretty obvious you had wet or frozen clothing and failed to meet minimum temp requirement at some point while sleeping. 
  it’s not a bug.