If you check the Pulse of the double, and its named Unknown Entity, then you can safely kill and (hopefully) Hide the Body!

@ Nihil Baxter,
Sadly thats what I and my crew are doing for weeks now.
Whenever the Server crashes or restarts, we restart the DayZ Standalone Client.
However, this is just a workaround and no solution, maybe gets fixed in 0.47 stable?
Hope for it,
best regards.

This Report needs more attention, due to the fact that the game crashed are still in 0.46!
This has become so annoying, every Server Change result in a game crash now.

happened again after Server Restart. tried to connect to another Server....

@ bobbyboy,

it happend now severals times, I got the disconnect without having a hard case.
An I also had nothing ruined after reconnection.

Had the same crash again a few minutes ago, I can provide the Logfiles
https://dl.dropboxusercontent.com/u/97662687/DayZ.rar

Same issue for me, exactly as described. (Also on win 7 64-Bit)
Try to connect to another Server (maybe after Message "Session Lost" and then reconnect?), then DayZ crashes Windows says "DayZ stopped working".
My clone wont disappear execpt for killing him.