I have replicated an error when entering/exiting a cave during a earthquake, either alive or dead, the game freezes and disrupts whoever went through. Further, if you are hosting the server the other users aren't interrupted for a while and then a warning: "Authentication failed. Something fishy is going on...either we couldn't reacg the Klei server or you're not who you say you are."
Steps to Reproduce
2 player test 1) default game settings, day 30 2) Deerclops arrives 3) Go into cave at arrival and await Earthquake from giant 4) Tried exiting/entering during the quake 5) Error as listed above - It did not matter if you were in the cave or going into it. if quake event happened this occured.
This issue has not been confirmed by a developer yet.