Logged into my account and my Monk was dead

Dear Blizzard

i have played all your games and must say i am an heavy fan of your games.
today i logged into my hardcore Monk paragon 600 or something abt 35 hours played.

and this monk was dead.

my big question is how ? when ?

is this a bug ? if so how do i rapport this?
where

There should be a screenshot showing how and when your hero died.

check the hall of heroes (where dead HC characters go)