The reported location is the Sea God's Tear location in Daila sanctum. When an empty chest is randomised to this location, it will result in a ??? item when interacted with. The most likely solution would be to add guards in the item randomiser to prevent special chests (e.g. empty, Mimic, maybe others?) being placed in these special locations.
Untested, but this is a list of locations most likely to display this behaviour:
The reported location is the Sea God's Tear location in Daila sanctum. When an empty chest is randomised to this location, it will result in a ??? item when interacted with. The most likely solution would be to add guards in the item randomiser to prevent special chests (e.g. empty, Mimic, maybe others?) being placed in these special locations.
Untested, but this is a list of locations most likely to display this behaviour: