In the building pictured below, you are not able to view inventory of fence, gate, specific tents, or cannot build on in general. If you were to build a fence you would have to add items to it via looking at the fence. You can not access the fence to, for example, add barbed wire., or add more nails by dragging and dropping. You cannot see the planks, nails, barbed wire, wire, stored on the ground when building. You cannot apply barbed wire when building a fence as the wire is below the floor.
When you place a Canopy tent you cannot access the tent's inventory. You can access Medium Tents. I believe you can access Large Military Tents too. You cannot build a Tarp Tent, when you craft the crafting circle will fill and reset. You can access barrels, sea chests, and sometimes crates.
You cannot access crates when you apply them via "blueprint". As the crate will go underground. You need to drop in the vicinity for it to remain above the surface. If you apply a barrel via "blueprint" half of the barrel will remain above the ground but it is still accessible.
Throwing items often teleport through the ground and disappear.