This is also occurring on the server I am hosting. Can't exactly figure out what triggers it but I can say that:
1.) When the bug occurs it also removes and refreshes any names you have given to the container to it's default.
This makes me think it's a loading bug of some sort, where once you leave the chunk the game has trouble loading back exactly what was in that container.
2.) The bug can also occur when loading back into a server from the server browser. i'd imagine for a similar reason as stated above.
3.) The bug does not effect all containers and I think it effects only containers which can be equipped as primary. The bug also effects some furniture like ovens.
4.) Still unclear if the bug occurs while using the admin teleport command and teleporting into the chunk with the effected containers.
