(1) PC
(2) I was playing alone
(3) I was playing Drizzt
(4) I could find no work around despite many tries with character placement, respawn, etc.
(Steps) I was following the quest line and exploring that area pictured and located the chest.
(Result) See location in attached images. During Act I The hunting grounds of The Fury of Icewind, Vanquisher difficulty. After opening a chest, a legendary item dropped, but was not lootable. See images. I moved the character all around the item, the prompt to press E to loot/interact did not show up. I intentionally died and came back, no change. It was there, but not lootable. Obvs very disappointing due to leggo.
(Expected Result) I expected it to be lootable.