Same on our end. Pure stock server. However, I've found that you can get barrel inventory to show in most cases, try differentiating the angle at which you're facing the barrel, and also your distance to the barrel. Seemingly there's no fixed sweet-spot and the 2nd time you try that same barrel, it might require a different angle/distance. In some cases you'll need to toggle the barrel (inventory) up/down arrow for the contents-grid to show up.