There is an unreachable chest in The Upper Necropolis (Imperial Era), as it can be seen on the screenshot, below my character in the ground.
Sreenshot: https://imgur.com/a/AKf1gLN
Going from Yulia’s Haven into the The Upper Necropolis, moving to the right, then down leads to a small arena. Killing enemies there quickly triggers two waves of enemies coming from the arena’s entrance. The unreachable chest is located to the bottom left of the arena. Possibly it is supposed to only spawn conditionally, for example when all enemies are defeated, which it does not right now. Defeating all enemies in the arena does not make it spawn or interactable.
I also tried logging out, restarting the game, logging in and doing the same thing over again, clearing out the arena of its enemies and spawning waves, but the chest remains unreachable and uninteractable.