[2019] Server reset today caused my toon to die and lost a few important items

Hello @Saltaf, welcome to the forums!

Even when you’re offline, your character can still die to extreme heat or cold while sleeping, which is not an issue but an intended mechanic.

We’d suggest checking for any temperature effects before exiting the game, as well as depositing all your inventory in a chest in order to prevent any possible loss of items should something happen to their characters while you’re offline. It’s also recommended not to sleep close to heat sources such as furnaces, and be aware that they provide heat even when above or below the area they’ve been placed in.