In update 0.30.113842, a countermeasure against abuse to the login system was added. From now on, whenever a player disconnects while being unconscious or restrained, they will be killed.
It's a good idea, but it's incredibly blind design. We are in a world where random crashes and disconnects are a thing. There are so many points of failure (game crash, hardware crash, internet outage, server outage) that this feature makes zero sense.
It's not so bad when you crash in other games (in a shooter you might lose the match when you crash, a crash in an MMORPG might make you lose money, exp and loot), but in the unique case of DayZ, making it so that in certain circumstances, you lose your character that might have hours or days of work put into it, for something 100% outside of their control, is not good design. Punishing the player for something entirely beyond their control is a cardinal sin in game design, especially with a punishment with this level of severity.