Lost Rare Item ****ty respawn system

I do not understand this pathetic respawning system, had my inventory full, checked what to dump and what not, not even the time to do that the mob I was looting was gone with a rare item with it, funny enough the corpses disappear in less than half minute and mobs taken freaking ages to respawn.
- Wonder if there are any chances to get my item back ?
Had to start a new topic because me and my mates several times opened tickets and never had an answer back.
Cheers

They don't restore items in these cases.