When you fall asleep, quite a few people have reported losing weapons, and i think i know why, when you fall asleep, you dont have any weapons, i know this because ive fallen asleep with equitment menu open, and it shows no weapons.
Eldar suggests this is due to the weapon changes, but i dont know.
And in other times, i have died, and no weapons have dropped, i do not know the cause or an error.