So I got stunned and then interrupted twice, and then I got dead. I zoned to the guild lobby, summoned my corpse, clicked "Loot All" and -- as soon as I had all my stuff, the corpse poofed.
I figured that the corpse had to still be there, it was just under the floor or something: so I typed /corpse. That gave me the message, "You don't have any corpses in this zone."
Reminds me of the good old days, when you had to leave something on your corpse if you hadn't been rezzed yet, or else it would poof and you would no longer have a corpse to be rezzed.
Has anyone else had this happen? Is it just a random unexplainable incident, or is this a new feature since the last patch?