Hello,

Most likely this is just the way the game engine works and not actually bugs, but I figure I'll report it just in case. I've noticed w/two low-level leves that when the chests appear they're kind of floating above the ground:

Leve: Lvl 5 Far from the Vine
Location: Lower La Noscea - Cedarwood - Red Rooster Stead
Loot Chest: Actually spawned hovering above the grape vines a bit as if it were stuck on the vine (may be intended).

Leve: Lvl 10 What Peistes Crave
Location: Horizon Ul'dah
Loot Chest: Appears to be floating on the water rather than immersed in it.

Likely just the way things are but, just in case. I don't have any screenshots unfortunately.