I had a lvl 25 monk on hardcore mode , it died it was my fault so i made a new one and his stash items were gone all replaced by the stash items from my high level non hardcore character.

before my lvl 25 monk i had a lvl 35 monk that died and the items from that character transfer to the new lvl 25 , when the lvl 25 died i put the lvl 35 and lvl 25 in the list of hardcore characters that died and when i made the new one i found a stash with my non lvl 53 wizard items in it and my wizard still has his stash so it kinda made a duplicate of the lvl 53 to my lvl 6 new monk in hardcore.