I was reproducing it today with my female warrior character (got one of those ZERO chests bugged again, silly me never learns to not put them on the ground while opened, closed chests don't seem to glitch XD), might have found a guaranteed way to retrieve them. It seems to be tied to the camera rather than to your character. So positioning yourself as far as possible to force the chest turning visible (although black), then holding shift, or pressing caps lock and moving the "camera" close to the chest, but not too close, so it will stay visible, then clicking on (or near) it to send your character there, he/she will get close and the chest won't disappear (tested), once they are close to each other, open your inventory and drag the chest in, you can let go of shift, or press CL again to resume the default camera view.
Last edited by Levianne; 10/11/19 07:02 PM.